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Whenever Holley produces a harness that doesn't neatly fit into any of the other harness categories, we put them here. Not to imply that they are any less important!
Wouldn't it be nice to be able to leave the handheld controller connected on your Holley Sniper or T..
$38.83 $34.95
Need to extend the CAN bus harness on your Terminator, HP, or Dominator EFI System? This harne..
$61.62 $55.46
Need to extend the CAN bus harness on your Terminator, HP, or Dominator EFI System? This harne..
$46.19 $41.57
Need to extend the CAN bus harness on your Terminator, HP, or Dominator EFI System? This harne..
$53.90 $48.51
Need to extend the CAN bus harness on your Terminator, HP, or Dominator EFI System? This harne..
$42.03 $37.83
Did you know that you can unlock even more tuning capability in your Holley Sniper EFI System? ..
$72.97 $65.67
No reason to give up the impressive Variable Valve Timing (VVT) capabilities of the 2009+ Gen III He..
$105.00 $94.41
Ti-VCT Controller harness. Must be used with Holley's Ti-VCT Controller. Specify your mo..
$325.00 $291.95
Wideband Oxygen Sensor Extension Cable, 4'. This harness works with the 554-100 Holley NTK and..
$122.00 $108.95
Power Harness for Holley Avenger, HP, and Dominator ECUs..
$90.86 $81.77
Holley LS main harnesses have a MAP sensor connecter designed for use with an LS1/2 style MAP sensor..
$37.89 $34.10
7' long sealed USB data cable (comes with ECU's, order this as a replacement or a spare.) Als..
$72.61 $65.35
When you replace the factory ECU controlling a GM LS or late-model truck motor don't forget that's w..
$24.13 $21.72
Need to extend the CAN bus harness on your Sniper or Terminator X EFI System? This harness wil..
$36.62 $32.95
