Holley EFI

This kit contains plug-and-play harnesses to connect Holley 24x or 58x main harness to Holley waste-fire DIS coils. Not compatible with 556-112 coil near plug smart coils (see 558-312 for 556-112...

Holley EFI Wiring Shop just keeps getting better! We have one goal, to provide you a one stop solution for all of your wiring components needs. From connectors and pins to wire loom and tools! We...

1 Bar Map Sensor, 1/8-27 NPTFeaturesDesigned for GM LS Gen III and IV engines equipped with GM LS1/2/6 (cathedral port) cylinder headsDesigned for forced induction (supercharged or turbocharged)...

Introducing the Holley EFI Single Channel EGT Kits. Exhaust Gas Temperature data is critical information when your engine tune up is on the ragged edge. Knowing the exhaust temperature can help you...

Exhaust Gas Temperature is a critical indicator of the performance of a typical racing engine.FeaturesCompatible with HP or Dominator EFITi-VCT Cam control down to 400 RPMUser programmable tables...

316 Stainless steel Cap for 1/4" EGT bungs.FeaturesMachined billet constructionClear/black anodized for long-term protection from elements and fuelsModular Lo-Ram design allows user customization...

316 Stainless steel Cap for 1/4" EGT bungs.FeaturesMachined billet constructionClear/black anodized for long-term protection from elements and fuelsWorks with all front feed Lo-Ram bases (300-602,...

316 Stainless steel weldment bungs for 1/4" EGT probes. These high-quality weld bungs feature a built-in step, which keeps the bung held in place during the welding process, ensuring a perfect weld...

316 Stainless steel weldment bung for 1/4" EGT probes. These high-quality weld bungs feature a built-in step, which keeps the bung held in place during the welding process, ensuring a perfect weld...

Rigidly mounting pressure transducers to your engine is never a good idea. Introducing the Holley EFI sensor block! Compatible with all transducers that utilize 1/8 NPT male threads and 7/8" or...

100 PSI / -40C TO 105C - SENSOR COMBOFeaturesDesigned for GM LS Engines with 58x Crank, 4x Cam - and EV1 Injectors.Real-Time fuel map learn, takes the guess work out of tuning your base fuel table...

Plug and play for Holley Avenger, Terminator, HP, and Dominator ECU fuel and oil pressure inputs.FeaturesDesigned for GM LS Gen III and IV engines equipped with GM LS3/L92 cylinder headsProvides best...