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 Systems/ECU's Products
Items 1-11 of 11
Holley HP LS EFI ECU & Wiring Harness, For 24x Cranks, EachNew
Price too low to advertise
ECU & Wiring Harness for 24x Cranks
NTK Wideband Oxygen Sensor
Plug and paly with LS1/LS6
boost control, nitrous control, and water/meth injection Capable
1-5 Bar M...
Description: Price too low to advertise
ECU & Wiring Harness for 24x Cranks
NTK Wideband Oxygen Sensor
Plug and paly with LS1/LS6
boost control, nitrous control, and water/meth injection Capable
1-5 Bar MAP sensor capability
Item #: HLY-550-602N
Condition: New
Please Call for Availability
Holley HP LS EFI ECU & Wiring Harness, For 58x CranksNew
ECU & Wiring Harness for 58x Cranks
injector harness for Jetronic / Minitimer (Bosch type) Injectors
NTK Wideband Oxygen Sensor
Plug and paly with LS2/LS3/LS7
boost control, nitrous control, ...
Description: ECU & Wiring Harness for 58x Cranks
injector harness for Jetronic / Minitimer (Bosch type) Injectors
NTK Wideband Oxygen Sensor
Plug and paly with LS2/LS3/LS7
boost control, nitrous control,...More Details »
Item #: HLY-550-607N
Condition: New
Please Call for Availability
FAST XFI Sportsman EFI, Multi-Port Engine ECU, EachNew
Comes with the Wiring Harness
Injector Harness and adapters
O2 Sensor
Electronic Fuel Pressure Kit
Utilizes FAST C-COM software
Supports N/A & boosted applications up to 5 bar
Works With EZ...
Description: Comes with the Wiring Harness
Injector Harness and adapters
O2 Sensor
Electronic Fuel Pressure Kit
Utilizes FAST C-COM software
Supports N/A & boosted applications up to 5 bar
Works With EZ-TCU, EZ-LS, XIM and FAST eDash
Item #: FAS-303000
Condition: New
Please Call for Availability
FAST EZ-LS Ignition ControllerNew
EZ-LS Ignition Controller
w/ wiring Harness and adapters
Works with EZ 2.0, Sportsman, or the XFI injection systems