Butler-LS - EFI/ECU Wiring & Accessories

EFI - EFI/ECU Wiring & Accessories

We are excited you have visited our brand new site. As you can see we are tirelessly building out our new site with performance parts, engines, and assemblies for your LS and GM needs. Check back often for more products and services.

Looking for an LS part and don't see it on the site? Need a rotating assembly, short block kit, or machine work? Our LS team here at Butler is shipping high performance GM/LS engines, kits, and parts all over the world.


Call us at 931-829-2200 today for any LS need.

Air and Fuel is vital to a thriving engine. No horsepower can be made with either air or fuel missing from the equation. Butler is your GM LS specialists when optimizing and tuning GM LS performance engines. Butler partners with many top companies in the street and race industry such as Edelbrock, Holley, Aeromotive, Mallory, Demon, FAST, and more to bring you top quality performance parts at the best prices possible. You don't just buy a part from Butler, you get our knowledge and expertise to back it up.

Browse EFI/ECU Wiring & Accessories Products

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Items 1-6 of 6
Description: LT1-IAC Pigtail IAC Adapter Harness Early to Late GM Sold Each
Item #: FAS-308023
Condition: New
Price: $12.95
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Description: Power Adder Wiring Harnesses Works with the FAST XFI engine management system Sold Each
Item #: FAS-301400
Condition: New
Price: $27.95
Qty:

Description: For GM LT1 applications Bolts to the throttle blade shaft Relays throttle opening/closing information to the ECU Made of high resistance material Sensitive rotator for accurate throttle position measurement
Item #: FAS-307028
Condition: New
Price: $54.95
Qty:

Description: XFI Injector Wiring Harness For LS1 and LS6 With Minitimer Injectors/EV1 Style 18726543 Firing Order Sold Each
Item #: FAS-301202
Condition: New
Price: $115.95
Qty:

Description: XFI Injector Wiring Harness 18436572 Firing Order SBC & BBC Sold Each
Item #: FAS-301200
Condition: New
Price: $117.95
Qty:

Description: XFI Main Wiring Harness Terminated Ends Clearly labeled wires Weather Pack connectors For LS1, LS2, LS7, Each
Item #: FAS-301108
Condition: New
Price: $325.95
Qty:

Items 1-6 of 6

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