Quicksilver 807166A2 Exhaust Water Shutter Kit For MerCruiser 4.3L Engines With 1-Piece Exhaust ManifoldsQuicksilver 807166A2 Exhaust water shutter kit for MerCruiser 4.3L sterndrive engines with 1-piece exhaust manifolds. Designed for Y-pipes with a 2.98 in. cross pin diameter.Features Fits 19962001 MerCruiser 4.3L engines with 1-piece exhaust manifolds; For use on sterndrive engine Y-pipes with 2.98 in. cross pin diameter; Helps prevent water from entering engine through exhaust; Easy to install with common shop tools; See owner's or service manual for specific applications;