#1 Aftermarket Engine Swap Parts Retailer

Over the years engine swaps have become more and more popular to the automotive enthusiast. LS Swaps, Coyote Swaps and Hemi Swaps are some of the most popular options. Holley has become the #1 aftermarket authority for making these engine swaps possible and straight forward. Navigate your way through curated shopping experiences for the specific swap you're after, or browse through exciting categories loaded with products for your engine swap.

Terminator X - A Plug and Play standalone engine control system for LS engines. The Terminator X features real-time fuel learn, high impedance injector drivers, intergraded 1bar MAP sensors & 4 programmable inputs and outputs. A must have for completing your Engine Swap!

Accessory Drive and Bracket Kits - If you're stuffing a late model powerplant into your classic project and need to find a way to get accessories mounted to the front of your LS, LT, Small Block Chevy, Big Block Chevy, Small Block Ford, or Gen III Hemi, we have the solutions to get your engine swap finished! Choose from High Mount, Low Mount or Mid Mount. Choose from Natural Aluminum, Black or Polished. High Mount & Low Mount allow reuse of factory components.

Transmission Swap Parts - When adding a 5 or 6-speed transmission to your classic muscle car, we have the driveline conversion components you need.

Headers and Exhaust Manifolds - The shorty tight tuck design means you can route exhaust tubing close to your frame/floor pan for maximum ground clearance. Choose from different finishes like Natural Cast, Black and Silver Ceramic. Customize your system by choosing from different dump options such as center dump, rear dump and more!

Engine Swap Oil Pans - Engine swap oil pans provide maximum clearance to the chassis and ground. Factory oil pans don't fit or they hang too low on engine swaps. Choose from natural aluminum casting, carbon black ceramic finish, or fabricated sheetmetal depending on the application.

Swap Accessories - Shop an exciting product assortment catered to your needs. Featuring Pedal Brackets, Exhaust, Steering, Tunnel Patch Kits, Catalytic Converters and more!