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Novak Conversions


Novak Conversions is the industry leader in Jeep engine and transmission swap kits, adapters, and turnkey powertrains.
Since 1967 we've engineered the most trusted solutions for upgrading Jeep CJ, YJ, TJ, JK, and other classic and modern platforms.
Every kit is designed, machined, and supported in the USA by real technicians and Jeep enthusiasts.

What Our Customers Say

PN: MMXJ3

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★★★★★

“Perfect fit. No problems.”

— Lannie

PN: 231MR-2

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★★★★★

“This kit made it easy for me to rebuild my transfer case. The instructions were very good. Everything worked great. Novak makes a great kit and a name you can trust! Thanks.”

— Paul

PN: MMX-WA1

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★★★★★

“This is another great product I have purchased from novak. I will buy more in the future. Their products are always top notch.”

— Sam

PN: 103-4-6

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★★★★★

“Everything with the Novak adapter was as advertised. It was one of the most easy conversions that we have ever done. Would recommend Novak adapter kits.”

— Greg

PN: 432-4-6T

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★★★★★

“Perfect fit, excellent workmanship and looks really good. Extremely pleased, highly recommend.”

— Clint

PN: 131-27L

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★★★★★

“This is the first time I have rebuild a transfercase. With that as my knowledge back ground I was able to put this kit in and the np231 still works.”

— Dalton

PN: EH001

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★★★★★

“Do yourself a favor and use the Novak library. It is a valuable resource that will make your build a lot easier. Novac has been doing this a while and their research saved me a lot of time and headache. The shorty headers are top quality and fit perfectly with no modifications. Quality V bands and gaskets in the kit. Price point is competitive and quality is the best. Novac made my build a success.”

— Steve

PN: 3901178

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★★★★★

“Great service,fast shipping, good quality parts..! Fit my transmission perfectly.”

— Robert

PN: 4L61-23

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★★★★★

“This is not the first time I purchase parts from Novak. As always, it works perfect, very high quality product, great support. Very happy to be your customer!”

— Vahan

PN: SLR-176K

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★★★★★

“Loose shifter? Cure it with Novak! Where else can you get brand new parts for a 1953 transmission! Fits like factory, and the quality is there. Price is low for what you get, if you have read the website, you know these are Jeep people, first and foremost. Their knowledge base has enabled me, as a beginner, to accomplish an entire power train swap, in my driveway. You can do it too, with Novak!”

— Charles

PN: 4636382

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★★★★★

“Brand new part, very good price, hard to beat the service from Novak, even when international shipping is involved, thanks guys.”

— Christian

PN: MMYJ-G3

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★★★★★

“Novak's predetermined weld-in mounts are spot on. Measured twice, burned them in, and set the LS perfectly in place. Not a single issue. Thank you Novak!!!!”

— Phil

PN: SK4X

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★★★★★

“The kit worked perfectly. The quality of the kit was awesome, and the instructions were clear. I would definitely recommend this product to anyone who is looking to upgrade their shift linkage and have a confident feeling when using 4-wheel drive.”

— Jeff

PN: 8133951-KU

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★★★★★

“Like all the parts I've bought from Novak, this bellhousing was very nice, performed well and was just as described. I also have a Novak adapter for the Jeep Dana 300 to a Ford NP435 transmission. These parts were great too and their customer service was very good too, when I had a question.”

— Kevin

PN: 1879

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★★★★★

“Fit and finish exceeded my expectations, excellent quality.”

— Kevin

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Frequently Asked Questions

What does Novak Conversions do?

Novak Conversions designs and manufactures Jeep engine swap kits, transmission adapters, shifters, motor mounts, and turnkey powertrain systems. Since 1967, we’ve focused exclusively on Jeep powertrain solutions for CJ, YJ, TJ, JK, JL, and other classic and modern platforms.

Are Novak’s parts made in the USA?

Yes. Novak engineers, machines, and assembles the majority of our components in-house at our facility in Logan, Utah. This includes adapters, shifters, mounts, and many of our precision parts.

What engines can I swap into my Jeep using Novak parts?

Common Jeep swaps include GM LS engines, Gen III/IV/V V8s, Chevy inline engines, Dodge Hemi engines, and various four- and six-cylinder modern platforms. We manufacture the adapters, mounts, clutch components, wiring options, and hardware needed for a complete conversion.

Does Novak offer turnkey powertrain packages?

Yes. Novak supplies complete turnkey powertrain packages based on remanufactured transmissions and transfer cases, as well as full installation kits tailored to your specific Jeep model and build goals.

Does Novak provide technical support?

Absolutely. Our team consists of experienced technicians, machinists, and Jeep enthusiasts who offer direct phone and email support for planning, installing, and troubleshooting your Jeep conversion.

How long has Novak been in business?

Novak has specialized in Jeep powertrain conversions since 1967. With nearly 60 years of experience, we provide some of the most proven, reliable, and well-supported swap components in the industry.