Holley 558-491 Sniper EFI I/O Harness
Guaranteed Fitment
Always the correct part
Added Value
Performance matched parts
In-House Experts
We know our products
Nationwide Delivery
Economy shipping
Body, Exterior & Accessories ❯
Brakes ❯
Tools, Hardware & Consumables ❯
Towing, Trailer & Truck Accessories ❯
Always the correct part
Performance matched parts
We know our products
Economy shipping
This harness gives you the access to 2 Ground Trigger Inputs, 3 Ground Trigger Outputs, also the Points Output, Tachometer output, and Digital Gauge Output Wires. The Input Grounds can be used for things such as AC Kick, and nitrous stage activation! The Output Grounds can be used for Electronic Fan Control, or A/C Shutdown at WOT.
Description_DEF | Computer Chip Programmer Input Cable |
Description_DES | Sniper EFI I/O Harness |
Description_FAB | Input/Output Wires |
Description_INV | 10 PIN HARNESS, SNIPER TBI |
Description_EXT | Sniper EFI I/O Harness; Incl. 10 PIN Terminated End; Incl. Ground Trigger I/O Wires; Tach Output Wire; Points Output Wire; Digital Gauge Out Wire; |
Description_SHO | CpCnctCbl |
Description_MKT | This harness gives you the access to 2 Ground Trigger Inputs, 3 Ground Trigger Outputs, also the Points Output, Tachometer output, and Digital Gauge Output Wires. The Input Grounds can be used for things such as AC Kick, and nitrous stage activation! The Output Grounds can be used for Electronic Fan Control, or A/C Shutdown at WOT. |
WARNING CA Proposition 65 | No |
Length | 4.2000 |
Width | 5.9000 |
Height | 6.4000 |
Weight | 0.4500 |
Adding product to your cart
Solid hitch with serious strength and clean powder coat, heavy to lift, but installs easy and tows perfectly!!
Shipping was quick and on time - exactly what I needed for my small-block build - would buy again for sure
Weatherbeater mats fit my work truck perfectly. Dropped them in and nothing moves. Truly a great upgrade
Window visors look incredible and feel durable, install was simple. Zero wind noise on the highway!
Leveling kit components were well packed. Instructions lacking, but online videos helped. Rides level now and feels planted.
Found single lifter pairs in stock here when others required full sets, fast shipping got me racing again, hell yeah!!
Rear bumper upgrade looks better than factory plastic. Install was easy, and functionality is miles ahead. Highly recommended.
Tonneau cover fit is excellent. Clear instructions and a smooth install. Delivery to my door was super convenient
Turbo arrived next morning and matched description. Bolted up cleanly and truck is back to full power.
Husband’s birthday grille guard is rock solid, looks sharp he loves it so much!!! Thanks again
Customer service handled a damaged shipment immediately. Refund was painless. I’ll shop here again.
Exhaust system installed in two hours on my first try. Perfect fit and the sound is pure joy.
Need help? We're available at (877) 743-7862 or email us at: sales@shdp.ca
Ship To Your Home or Pick Up In Store
Cash, Debit, Credit, PayPal, and Financing
Shop With Confidence
Get the Help You Need