GM 305 5.0, 350 5.7, 377 6.2, small block V8 engines

Knock sensor for GM Small Block marine engines like Mercruiser, OMC, Volvo, PCM, Marine Power and Crusader.

This goes in the water port in the middle of the block just above the oil pan on GM Small Block engines.

– ALL PRODUCTS ARE BRAND NEW, RETURNS ACCEPTED UNTIL 30 DAYS AFTER PURCHASE, EITHER A REPLACEMENT OR A FULL REFUND.