These parts are designed for the GM Gen III/IV LS series of engines. These parts are available for most common plumbing applications on these engines.

These parts are designed for the GM Gen V LT series of engines. These parts are available for most common plumbing applications on these engines.

These parts are designed for the Mopar Gen III Hemi engines.

These parts are designed for the Ford Coyote series of engines.

Parts Developed Specifically for the ARCA / NASCAR Racing Series.

These plumbing kits are designed to provide the needed parts for a specific installation. The kit eliminates the effort and hassle to figure out what is needed for that installation.

Earl's Transmission Adapters Screw into the Transmission Case, and allow Easy Installation of an Oil Cooler Using AN -6 Hoses. These adapters are ideal for use with Earl's UltraPro and Temp-A-Cure oil coolers.

Shop fuel system kits at Holley for EFI installations and upgrades. Browse return-style and returnless kits, including options with electric fuel pumps, pressure regulators, filters, fuel hose, fittings, and installation hardware. Find Holley EFI and Sniper EFI fuel kits, plus Earl's Vapor Guard plumbing kits.

These adapters are designed to easy plumbing of the turbocharger oiling system.