Guided wire harness build tutorials



A range of electrical connectors, kits and equipment to aid in your swap

Pushing the envelope on Hemi based engine swaps, bringing more tech to the market at a routine pace

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Frequently Asked Questions

  • Where can I purchase DIYHEMI.com products? Click here.

  • What makes/models do you support? Our products are designed to retrofit any 2003+ Gen III/IV Hemi engine into your vintage project. Late model vehicle swaps are not supported at this time.

  • Do you offer complete wiring harnesses? Not at this time. Our current wiring harnesses are our QuickHemi series. They require that you use the factory engine harness for your application. The QuickHemi simply allows the factory harness to work in standalone configuration.

  • Do you perform Hemi swaps in house? We do perform engine swaps for R&D purposes. The knowledge gained is shared with the GenIII swap community and new products are developed this way. We do not do routine installations at this time but will in the future.

  • What is the lowest cost GenIII swap engine to use? Mostly the 2003-2008 truck 5.7. They are very low cost and can run off a standard US based 2005 Dodge Ram ECM. These are the shoestring budget swaps that really pack punch with little upfront cost. Any Hemi is an excellent choice, prices may vary.

A collection of cars we've renovated with passion



Started in 2015, DIYHEMI.COM is the result of many hours of research to find a cost effective method to swap late model Hemi engines into various vehicles that were not originally produced with them.

Our Mission is to make Hemi engine swaps more popular and affordable to all audiences, in the interest of bringing hotrodders together, regardless of background.

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