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Custom Built Turn-Key Performance Crate Engines

Being on the worlds stage, Proformance Unlimited is one of the most sought after Custom Built Turn-Key Performance Crate Engines builder. We build a variety of hot rods engines that will suit the needs of every car enthusiast. Our dedication to detail and quality parts is what separates us from the rest. Check out our customer reviews and crate engine videos and you will see that our muscle car engines will exceed your expectations. Our customers tell us they spend hours watching our dyno videos.

With our strict standards, you can be rest assured that you will receive a 100% perfect engine that will stand up to the test of time. Our highly experienced staff knows what it takes to customize your engine and tailor it to your needs. The days of back and forth trips to the machine shops, trial and errors and expensive mistakes are a thing of the past.

Is your current Chevy, Ford, Pontiac, or Chrysler engine tired and worn out? Are you unable to keep up with the Honda Civic down the street from you? If so then you are in serious need of an upgrade from Proformance Unlimited Custom Crate Engines. With that being said, Let the experts design and build you a crate engine that will allow you to dominate the street. We can also custom paint the engine to match your project. If you are in the market for a transmission to match your application we work with some of the best transmission builders in the country. We are a one stop shop for all your complete drive train needs.

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Check out our complete line of Custom Built Crate Engines.

Chevy Crate Engines

Nations Leader In Custom Built Turn-Key Performance Crate Engines

LS Crate Performance Engines

Performance Crate Engines

Ford Performance Crate Engines

Ford Performance Crate Engines

MK4 Roadster Engines

MK4 Roadster Engines

Mopar Turn-Key Crate Engines

Mopar Turn-Key Crate Engines

Pontiac Crate Engines

Pontiac Crate Engines

We Also Build Airboat Race Engines!

If you are in the market for an Airboat engine to re-power your boat, Proformance Unlimited wants you to know we are committed to designing you the ultimate engine combination. Whether your Airboat is used for racing, pleasure, fishing or hunting, we can design the right engine to fit your needs.

Here at Proformance Unlimited have been working on these engines for several years now in close relations with airboat racers, enthusiast and manufactures to develop an engine to withstand the hobbies abusive conditions. The parts we are using in these Airboat engine builds are hands on selected and tested to ensure it’s reliability.

Please take the time to browse through our line of Airboat engine combinations. If you should have any questions or need help choosing the right one for your specific needs, give us a call and we will be happy to help.

SEE OUR AIRBOAT ENGINES

OUR ENGINES FEATURED ON

Thank you for taking the time to look at our engine products. Each build is hand assembled one at a time. All engines are custom built to order to assure that your crate engine will arrive just the way you need it.

Our staff is also available to answer any technical questions you may have before and after your engine arrives. We are most proud of our satisfied customer base. When you purchase an engine from Proformance Unlimited you become part of a growing family and you can be assured you made the right choice. You have our personal guarantee that we will build you a product we all can be proud of.

Engines Powered By Proformance Unlimited Are “Street Smart & Track Tough.” If Horse Power and Torque Is What You Want, Look No Further! The Quality Of Our High Performance Engines Are Second To None! We Build, Test, And Tune All Our Engines Start To Finish!

  • Proformance Unlimited Review 383CI SBC Stroker Crate Engine

    Hey Steve! I just got my car back last week after the engine swap and I'm actually still alive! You guys built a fabulous 383 Stroker - 450H.P. engine for my '80 corvette and it runs and sounds every bit as good as i had hoped. It really screams, and afterwards, I do too, like [...]

  • Proformance Unlimited Review Chevy 383CI Stroker Engine

    Thank you guys so much for building an awesome engine! This 383 stroker screams at 400 hp! The shop that installed my motor was very very inpressed! The engine was shipped already tuned and all dialed in! They had a Roush mustang and they said that my engine that was built by profornance unlimited was [...]

  • Proformance Unlimited Chevy 383 Stroker Engine Customer Review

    In 2014, I decided that I wanted to upgrade and rebuild a 1937 Ford Cabriolet that had been my father-in-law's for over 20 years. So....I began with the engine and transmission. I contacted Performance Unlimited at the time in NJ. Steve worked with me to design the engine of my dreams for this car. We [...]

  • Customer Testimonial Chevy 383CI Crate Engine Proformance Unlimited

    I purchased this 383/510 back in 2004 and now have it in an 85 Blazer with 5 speed. 13 year old motor runs better than ever! Fastest combo I've ever had. Proformance Unlimited delivers QUALITY performance.

  • Chevy 454CI Crate Engine Review Proformance Unlimited

    WOW!! Great experience dealing with Steve. He was very helpful with any question and resolving any questions.This is the car that your 454 engine promotion video went in. It was the 2017 Second place winner in its class at World of Wheels in Pittsburgh and First Place 2017 Street Achievement Award in paint. The car [...]

  • Customer Testimonial Chevy 427 Crate Engine Proformance Unlimited

    Steve,Here are some pics of the bad ass 427 stroker you guys built for my 1966 Chevy II.

  • Proformance Unlimited Customer Review Chevy LS7 427CI Crate Engine

    Customer review of Proformance Unlimited's Chevy LS7 427CI crate engine which was installed into a '64 Pontiac GTO.

  • Customer Review Chevy Camaro Crate Engine Proformance Unlimited

    Steve,The car is being broken in as I type. I have about 100 miles on the new engine and it is perfect.I can`t thank you and your team enough for building this for me and assisting me through the process.I had it installed over a weekend and then did the modification for the vacuum.Here are [...]

  • Proformance Unlimited Customer Review Chevy LS Crate Engine Melbourne, FL

    Steve, My name is Mike C. I’m the mechanic that installed the LS you guys built for Robs 69 Chevelle. I would like to say you guys did an awesome job. You delivered exactly what you said you would. A turn key engine that produces gobs of torque and HP. I literally had to do [...]

  • Customer Review Chevy 383CI Corvette Crate Engine

    The 383 stroker that you built for my 77 vette is just awesome! The car sits in a storage unit months at a time. However, it always fires right up without any hesitation and runs fantastic! I can't tell you enough good things about this motor and how reliable it is! I haven't have one [...]

  • Proformance Unlimited Chevy 383CI Crate Engine Review Melbourne, FL

    Steve,Just wanted to send you and your crew some pictures of my 35 hot rod with one of your 383 SBC stroker engines. It’s riding nice I’m waiting for my state inspection before putting it out on the road.I’ll swing by your shop so you can get a closer look.Thanks for the great looking and [...]

  • Customer Review Chevy 383 Stroker Engine by Proformance Unlimited

    Hi Steve,Just thought I'd flick a few photos through of our 1934 Chevy Sedan rod build, with the engine you supplied us...its all fixed in place on the newly built chassis with the Kugel front and rear ends all in too. Looking great so far I reckon 🙂Anyways - I hope all is well and [...]

  • Customer Review Proformance Unlimited Chevy 350CI Corvette Engine

    Hey Guys,It's taken me a while to get back to you but take a look at my finished project. Engine runs strong and sounds great!!! Hats off to you for a great engine build. Hope you have a prosperous 2009 with more business than you can keep up with.1973 Corvette Coupe, Body-off RestorationEngine: Proformance Unlimited [...]

  • Proformance Unlimited Chevy 350CI Customer Review Melbourne, FL

    Hi Kim,I can't help myself. I know I've already expressed my feelings on how happy I am with the 350/350HP Chevy power plant I purchased from your company. Truth be tooled, I've built a few hot rods over the years and have never ventured to far from home with any of them. Note: I recently [...]

  • Proformance Unlimited Customer Review Chevy 383CI Crate Engine

    Gentlemen:Here are a few pictures of the '68 Firebird my son in law and I built. We put in the Chevy 383 475 HP stroker and it runs as good as it looks.Ken FosterRiverton, Wyoming

  • Proformance Unlimited SBC 350CI Crate Engine Testimonial

    Proformance Unlimited,I want to take a few minutes and thank everyone at Proformance Unlimited for their professional dedication on the 350 440HP "high roller" engine that was so skillfully assembled for my 68' Camaro. after getting the engine compartment all ready I dropped the "roller" in and it fired up on the first crank!I really [...]

  • Customer Review BBC 502CI Crate Engine Proformance Unlimited

    Dear Doug & SteveIt was a pleasure meeting you guys when I picked up my engine (Chevy 502) when I pulled up and saw the engine sitting there I was amazed it stopped me in my tracks I can't believe the quality and craftsmanship of the engine you guys are awesome I would recommend you [...]

  • Proformance Unlimited Customer Review SBC 350CI Crate Engine

    Hey Guys !!What an absolute pleasure it has been working with you. The entire process of my motor build, from conception to completion, has been more than I could of hoped.The motor runs flawlessly. I just returned from a small car show in Prairie City, Oregon. The accolades were amazing. Many of the show participants [...]

  • Customer Review Chevy Camaro Crate Engine Proformance Unlimited

    Steve,Just wanted to let you know that the engine is in the Camaro. I started it up and am very impressed! It was rush to hear it run .I let it Idle for thirty five min. Now and then I INCREASE THE RPM TWO 2000,THEN 2400 ,never hit it hard, Though it was like a [...]

  • Testimonial Chevy 383 Stroker Engine by Proformance Unlimited Melbourne, FL

    Doug and Steve,I just wanted to thank you guys for the great 383-510 horse power stroker you built for my 81 pickup. Three days after it arrived, it was in my pickup and I was roasting the tires right out of the garage. I love beating on all the mustangs and Camaro's around town off [...]

  • Ford 408CI 351W Stroker Engine Customer Review

    Hello Steve, Doug and Team Thank you so much for the wonderful build of my Ford 408 Stroker motor. I bought this 1965 Mustang fastback at age 19 just before I went into the Navy. I traded a 1965 Mustang notchback (my first car), a dirt bike, and 900 dollars for it. It was wearing [...]

  • Customer Review Of Proformance Unlimited’s Ford 347CI Stroker Engine

    Steve,Finally got the transmission issues behind me and have the C6 installed. Can't thank you enough for the awesome motor! Here is the burnout video you asked for. I will be racing at Hemmings "Musclepalloza" on Labor Day weekend and will let you know how it does.I will be using you again if I get [...]

  • Proformance Unlimited Ford Mustang Crate Engine Customer Review

    Steve I can't thank you enough for the great engine you built for me . We started it yesterday for the first time and it fired on the first crank and ran great!

  • Customer Review Ford 347CI Crate Engine Proformance Unlimited

    I would like to thank Steve, Doug and all the team at Proformance Unlimited for a fantastic job on my 400 HP 347 build that actually did 360 HP on the dyno. The quality of craftsmanship was much better than it needed to be for my satisfaction. The attention to detail was the best I [...]

  • Proformance Unlimited Customer Review Ford 408CI Crate Engine

    This is the difference in who you get to build your crate engines.We contracted Proformance Unlimited to work with us in building the 408 Injected Roller Windsor for the XY build for one reason.......experience!There have been literally hundreds of "Crate Engine" companies starting up since they became popular 🙄 but nearly every one of these [...]

  • Customer Review Proformance Unlimited Ford 302CI Crate Engine

    I have had my 302 for around 5 years now, and i must say it is faultless and exceeded all expectations. A quality build couldn't be happier, the only time i have had to put a spanner on it is for servicing.A big thanks to the guy's at Proformance Unlimited.Craig

  • Customer Review Ford 347CI Stroker Engine Proformance Unlimited

    Thanks to you guys. I love my 347 stroker that you built for me. It's torque powerful and it's not bad with gas. You are very nice and professional people. I'm very pleased. Keep up the good work and thanks a million!

  • Customer Review Ford Mustang 347CI Crate Engine

    A big thank you to Steve and the crew at Custom Crate Engines.My 64 1/2 Mustang turned out better than I anticipated. I receive compliments ever time I take the car out for a ride.Steve was instrumental in helping me with my install and set up. If you want the best, buy from the best [...]

  • Proformance Unlimited Ford 347 Crate Engine Customer Review

    Just wanted to drop you a note. I bought this 347 from you in December and have put about 5000 miles on it so far. We just got back from the Falcon Nationals. We drove from just South of Baton Rouge to Wichita Kansas and back a total of 1665 miles. We had absolutely no [...]

  • Proformance Unlimited Ford 347CI Stroker Engine Customer Testimonial

    Hey Guys,Just wanted to send an update on my 56 Ford F-100. I'm sure u recognize that 347 stroker , Cant wait to get it started so i can hear that thing Purr especially with the cutouts !!Thanks again guys , after researching many engine builders I'm sure i chose the right one.Dean S

  • Customer Review Ford 408CI Stroker Engine Proformance Unlimited

    Thank you to Doug and Steve. This was my first build and these guys did an awesome job on my 408 stroker. They helped by explaining the full process of the build and answered all my questions.These guys are great to work with and do fantastic work. Love my engine!

  • Customer Review Ford Mustang Crate Engine by Proformance Unlimited

    Steve & Doug,,I would like to thank you both and the others in your shop for the 2 motors that you built for me the 302 went in the 77 PINTO WAGON turning consistent 11.98 with over 100- 1/4 mile runs hot lapping you all did a great job on that one, I know I [...]

  • Proformance Unlimited Customer Testimonial Ford 347CI Stroker Engine

    Hi pro guys,Just dropping you a note and a few pictures of my BEAST!! She looks great in the engine bay. You guy's are everything you advertise and I am glad I found your website. I am chomping at the bit to get out and chew some ass on the road. Proformance unlimited is confident [...]

  • Customer Testimonial Mercury Cyclone Crate Engine Proformance Unlimited

    Hey Steve, We got my Cyclone on the road. I have attached some pictures. The engine is more than I could ever imagine. I’m really proud of it. I’ve now got something I’ve always wanted. Thanks,Ron

  • Proformance Unlimited Ford 351CI Crate Engine Testimonial

    Dear Steve & DougI wanted to thank you for the great job you did on my 351w, not only does it look fantastic it run just as good I'm very pleased with the service, your price quote you gave me was right on target and delivered the level of performance I was looking for. The [...]

  • Ford 302CI Customer Review Proformance Unlimited Melbourne, FL

    Doug, Steve and the Proformance Unlimited Team -- Just a short note here to let you all know how pleased I am with my 302-380 HP custom engine by Proformance Unlimited. The engine runs great and is every bit of product you advertised it would be!! Quite the improvement over the original 289. The quality [...]

  • Customer Testimonial Ford Eleanor Crate Engine Proformance Unlimited

    I use Proformance Unlimited for all my custom crate engines for all my restorations and brand new muscle car builds including my Shelby and Eleanor Mustang replicas which sell and ship all over the world. The quality is second to none and so is the service. I would highly recommend Proformance Unlimited to any and [...]

  • Customer Review 351w Ford Mustang Crate Engine Proformance Unlimited

    Pro-Formance Unlimited Staff,We now have finished our 66 Mustang Resto-mod. The motor runs sweet and performs beyond our expectations. Thank you guys for the fine workmanship on the 351W. Attached are some pictures.John FitzRandolph

  • Customer Testimonial Proformance Unlimited Ford Crate Engine

    All that I can say is wow!! I think that beast will shove that mustang around like crazy. This whole process has been a pleasure and I am so excited to install this engine into the car. My business partner said the experience, pictures, and dyno hit sold him. I am sure he will have [...]

  • Customer Review Ford 427w Proformance Unlimited Crate Engine

    Hey Steve, Reggie here. Finally got the 62 falcon done. Was an engineering feat. Motor runsabsolutely perfect...sounds great...and it's wicked fast. Would just like to thank all involved in the engine build she is a beast!!

  • Pontiac 461CI Stroker Customer Testimonial

    Another Happy customer of Performance Unlimited!I can speak to longevity since I purchased the build 6 years ago. Still running very strong, no problems at all. It took me a while to do the complete frame off restore of my 68 GTO. I chose Performance Unlimited for my 461ci engine build with great results. I [...]

  • Proformance Unlimited Review 400CI Pontiac Crate Engine

    Hello, Just putting the finishing touches on the 66 GTO, you guys built me an awesome Pontiac 400 engine and I can’t thank you enough for helping me bring my son (Jeremy) dream car into a reality. It looks outstanding with outstanding sound and power. THANK YOU, THANK YOU, THANK YOU!!! Arthur Palm Coast, FL

  • Customer Review Proformance Unlimited Oldsmobile 350CI

    Hi Steve, I just wanted to actually follow up with you on that Olds 350 you guys built for me. You may recall that the initial installer wasnt truly prepared to bring the idea to fruition. He installed the engine, but it wasnt right. In fact, I didnt even drive it....lol....I knew all I had [...]

  • Customer Review Pontiac 461CI Crate Engine Proformance Unlimited

    Dear Steve:I wanted to let you know how much I appreciate the quality and precision put into building my engine. After 6 years my 461 Pontiac stroker is very strong with no leaks. I haven't even changed the spark plugs yet. I would never consider anyone but Proformance Unlimited to build my engines.1969 GTO Judge

  • Proformance Unlimited Pontiac 400CI Crate Engine Review

    Doug and Steve,I can’t thank you enough for building my 1970 Pontiac 400 with 10.75 to 1 compression, new Edelbrock performer rpm manifold, new Edelbrock 750 carburetor, and speed pro forged pistons. You painted it the correct Pontiac blue and it arrived beautifully put together. Thanks for taking the time to build me exactly what [...]

  • Customer Review Of Oldsmobile Crate Engine Proformance Unlimited

    Doug And Steve,I have been driving around now for about a week and I can certainly say without a doubt that you are a master craftsman. The feel of the engine is incredible, it did not respond this way when it was new. Everything is so tight and neat that I almost feel as if [...]

  • Proformance Unlimited Customer Review Pontiac Crate Engine

    Doug,I Got Into My First Race (A 68 Hopped Up Mustang)The Pony Just Couldn't Keep Up With Your Motor DougI Love It,CaryCalifornia

  • Customer Review Of Proformance Unlimited Crate Engine Melbourne, FL

    Doug and Steve,I just wanted to write a little E-mail about my engine that you built for me. I love it! It was delivered the way that we had talked about and the way that I wanted it. The service after the sale with you guys is excellent! You will have all of my engine [...]

  • Customer Review Of Proformance Unlimited Crate Engine

    Hey Doug and Steve,The Motor Looks Great Better Than I Expected. I Was Very Impressed With The Fast Turn Around And Service You Guys Provided For Me. After Getting Every Thing Hooked-Up I Pumped The Gas Twice And Turned The Key And She Fired Right Up Just Like You Said It Would. The Engine Sounds [...]

  • Customer Review Pontiac GTO Judge Crate Engine Proformance Unlimited

    Hey Doug,Just wanted to thank you and your staff for the great service. My 69 Judge is strong! Proformance Unlimited is number one in my book.Kim SellersLancaster, SC

  • Proformance Unlimited Customer Review Pontiac 461 Engine

    Hello Steve,Here are some photos of the engine in the car. The engine fits like a glove. I feel like I am 19 years old again, if I could get some use out of the back seat. I couldn't be happier with the engine. The sound makes everyone's head turn. It's always the highlight of [...]

  • Customer Review Pontiac 468 Crate Engine Proformance Unlimited Melbourne, FL

    Merry Christmas to everyone there.It's been a long time coming but I finally was able to finish the car and dyno run the engine.Couple years ago you built me a Pontiac 455 stroked to 468. I was asking for 500 to 600 HP. Your dyno went down before my engine could land on it.Well, I'm [...]

  • Customer Review of Proformance Unlimited Melbourne, FL

    Proformance Unlimited:I have worked with several other builders in the past and found that the knowledge and quality of workmanship that Proformance has will be my only choice for future builds. It was well worth traveling from upstate NY to meet and work with the staff. There is nothing else that compares to you.Jeff Kalinowski, [...]

  • Customer Review ’66 GTO Pontiac 461 Crate Engine by Proformance Unlimited

    I recently purchased a 461 Pontiac stoker and I want to tell you that I was absolutely overcome with the performance that this motor makes. I put the motor in my 66 GTO and fired it up. On the very first try it came to life and was an instant success. At first it sounded [...]

  • Proformance Unlimited Pontiac 400CI Customer Review

    Hi Kimberly:The engine arrived Tuesday at CPH Airport. The engine (Pontiac 400) looks fantastic, it is a pleasure to see work done by people who know what they are dealing with.P.S. Looking forward to see the new location that you are setting up.Regards.....Jens Christensen, Denmark

  • Pontiac 461CI ’69 GTO Customer Review Proformance Unlimited

    Here are some pictures of my car and engine compartment. I bought the 461 Pontiac stroker 475 H.P. and you were right, this engine is just what this car needed: awesome power, sound and looks. The engine has a big lumpy idle ( which is what I really wanted ) and sounds really good through [...]

  • Proformance Unlimited Customer Review Michael

    Kim,Please pass this along -The diligence and dedication demonstrated by your team shows in the quality of the work on this engine. It has totally met and blown away my expectations! I will highly recommend your company.Thank you, Michael S

  • Proformance Unlimited Customer Service Review Jason

    Steve,I just wanted to say thanks again for taking the time to personally call me to answer my question on the oil type. You guys have been awesome!! From the purchase all the way to over 2 years later, you have continued to support me and you have gained me as a lifetime customer for [...]

  • Proformance Unlimited Review by Alan Long

    Hey Guys,Hope everyone is still getting the engines they want. I have been running my '75 Pontiac TA with your 468/550 HP now for 2 years and what a blast! I am still having fun every weekend or whenever I get the chance.I still check your website to see any new videos you have out [...]

  • Pontiac 455CI Customer Engine Review Proformance Unlimited

    Hey guys:A few years ago you built me a Pontiac 455 with 475hp and painted it midnight blue to match my custom '68 GTO. Not long after I installed the motor, a mistake I made damaged it. I pulled the motor out and brought it back to you guys, and you figured out the problem [...]
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