EFI Systems & Accessories
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On Sale
Holley EFI LS Unterminated Universal Engine Main Harness for HP EFI/Dominator EFI 558-105
HOLLEY
Now: $493.95Was: $549.95Holley EFI LS Unterminated Universal Engine Main Harness for HP EFI/Dominator EFI 558-105 Unterminated Universal Main Harness for HP EFI & Dominator EFI Features: Unterminated for custom routing and wire lengths For Dominator and HP...558-105Now: $493.95Was: $549.95 -
HP Tuners E90/T93 Upgrade Kit ECM-00-E90-K
HP Tuners
$399.99HP Tuners E90/T93 Upgrade Kit ECM-00-E90-K Take full control of your truck’s performance with the GM E90/T93 Upgrade Kit!Designed for 2019-2022 GM vehicles equipped with the E90 ECM (engine control module) and T93 TCM (transmission control...ECM-00-E90-K$399.99 -
On Sale
Holley EFI LS (58X/4X) Engine Main Harness Extended for HP EFI/Dominator EFI 558-134
HOLLEY
Now: $619.95Was: $688.95Holley EFI LS (58X/4X) Engine Main Harness Extended for HP EFI/Dominator EFI 558-134 LS2/3/7+ (58x/4x) Engine Main Harness for HP EFI & Dominator EFI These harnesses are designed to fit most 24x and 58x LS engines, from 1997-2012. They are a...558-134Now: $619.95Was: $688.95 -
On Sale
Holley EFI LS (58X/4X) Engine Main Harness for HP EFI/Dominator EFI 558-103
HOLLEY
Now: $583.95Was: $649.95Holley EFI LS (58X/4X) Engine Main Harness for HP EFI/Dominator EFI 558-103 LS2/3/7+ (58x/4x) Engine Main Harness for HP EFI & Dominator EFI This harness has been designed to interface with 58x crank and 4x cam sensors. These engines are commonly...558-103Now: $583.95Was: $649.95 -
HP Tuners 15' Flying Lead Wiring Harness COR-HAR-003
HP Tuners
$549.99HP Tuners 15' Flying Lead Wiring Harness COR-HAR-003COR-HAR-003$549.99 -
HP Tuners Gen IV LS Drive-by-Wire EFI Wiring Harness 58x COR-HAR-002
HP Tuners
$949.99HP Tuners Gen IV LS Drive-by-Wire EFI Wiring Harness 58x COR-HAR-002COR-HAR-002$949.99 -
HP Tuners Gen III LS Drive-by-Cable EFI Wiring Harness 24x COR-HAR-001
HP Tuners
$949.99HP Tuners Gen III LS Drive-by-Cable EFI Wiring Harness 24x COR-HAR-001COR-HAR-001$949.99 -
On Sale
Holley GM Dominator Drive-by-Wire EFI Wiring Harness Early Truck 558-429
HOLLEY
Now: $248.35Was: $275.95Holley GM Dominator Drive-by-Wire EFI Wiring Harness Early Truck 558-429 Dominator EFI GM DBW Harness-Early Truck. Compatible with GM part number 10379038. Only the following factory drive-by-wire throttle bodies have been pre-calibrated and...558-429Now: $248.35Was: $275.95 -
On Sale
Holley EFI LSX Injector Harness for EV6 Injectors HP EFI/Dominator/Terminator X 558-201
HOLLEY
Now: $164.65Was: $182.95Holley EFI LSX Injector Harness for EV6 Injectors HP EFI/Dominator/Terminator X 558-201 LSx Injector Harness for HP EFI, Dominator EFI and Terminator X.558-201Now: $164.65Was: $182.95 -
On Sale
Holley GM Dominator Drive-by-Wire EFI Wiring Harness 558-406
HOLLEY
Now: $230.35Was: $255.95Holley GM Dominator Drive-by-Wire EFI Wiring Harness 558-406 Plug and Play with Holley Throttle Pedal Part Number - 145-160 Designed to work with GM Throttle body P/N's - 12570790 and 12580760 Designed to work with GM Throttle Pedal P/N - 10379038...558-406Now: $230.35Was: $255.95 -
HP Tuners MPVI/MPVI2/MPVI3/MPVI4 Credits
HP Tuners
$49.99HP Tuners MPVI/MPVI2/MPVI3/MPVI4 Credits Click the link below for supported vehicles to determine the amount of credits needed. Please triple check to make certain that you've entered the correct serial # for your module. We will email application keys...UC-0000$49.99