Collection: Tuning & Gauges

Holley Adapter Harness Wideband Terminator-X - 558-463

Holley CAN Adapter Harness 4ft Male to Female - 558-452

Holley Sniper EFI CAN to USB Dongle-Com. Cable - 558-443

Holley Sealed USB Cable - 15ft - 558-438

Holley Crank/Cam Ignition Harness - 558-431

Holley Can Adapter- New Device to 2-Pin Main Harness - 558-430

Holley Dominator EFI DBW Harness - Early Truck - 558-429

Holley CAN Extension Harness 9in Length - 558-428

Holley Can Extension Harness 12ft - 558-426

Holley CAN Extension Harness 8ft Length - 558-425

Holley Map Sensor Adapter LS1 & LS2 to LS3 - 558-416

Holley Sealed USB Cable - 558-409

Holley Drive By Wire Harness GM - 558-406

Holley Trans Wire Harness GM 4L60 Pre 2009 - 4L80 - 558-405

Holley J2B Auxiliary Harness Kit - 558-402

Holley Auxiliary Harness J2A Connector - 558-401

Holley J1A/B Input/Output Connector - 558-400

Holley EFI Main Power Harness - 558-308

Holley Injector Harness - Ford USCAR/EV6 Style Injector - 558-212

Holley EFI Injector Harness - Universal Unterminated - 558-204

Holley Sniper 2 Main Harness w/Fuel Pump Relay - 558-191

Holley Sniper 2 Main Harness For PDM - 558-190

Holley Sub-Harness Mopar Gen-3 Hemi VVT & SRV - 558-132

Holley Engine Main Harness Ford 5.0L/5.8L - 558-128

Holley Bench-Top EFI Test Harness - 558-127

Holley Flying Lead Main Harness - 558-126

Holley Main Wire Harness Hemi Late W/ TPS & IAC - 558-116

Holley Main Harness 99-04 Ford Modular Engine - 558-108

Holley Main Harness - Univesal Un-Terminated - 558-105

Holley Main Harness - Universal MPFI - 558-104

Holley Main Wiring Harness LS2 & LS3 - 558-103

Holley Main Wiring Harness LS1 & LS6 - 558-102

Holley TPI Stealth Ram Main Harness - 558-101

Holley Sniper EFI 3.5 Touch Screen LCD Controller - 553-115

Holley LTS Extension Cable - 534-199

Powermaster Harness Adapter CS130D to CS130 - 160