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Review on πŸš— Holley Sniper EFI Self-Tuning Master Kit - 550-511K by James Salem

Revainrating 5 out of 5

Works great on Chevy 350 Motor Boat (Mercruiser)

Comes with a complete HyperSpark system. I had to figure out how to connect (disconnect) the shift assistant. Connect the switch to the positive (purple) start signal wire. Works perfectly. I don't know exactly why, but no problems so far. I had to purchase and modify riser extensions to accept the O2 sensor. Bought a pair of MerCruiser 1.7 4.3 5.0 5.7 6.2 8.1 350 498 (174117262645) dry exhaust crankshaft spacers on E-Bay. Very happy with this Holley setup.

Pros
  • Automotive
Cons
  • Crumpled Packaging