Mercruiser Exhaust Y-pipe→Flappers

Part # & Price	Description
BPI89170 $49.95	Pair of Shutter Water Flapper Exhaust Y Pipe for Mercruiser BPI89170 replaces 807166A3 Pair (2 Flappers) of Exhaust Water Shutter Flapper for 4 Inch Y pipe used on Mercruiser. This includes a pair (2 Flappers). Fits into the "Y" Pipe on most V-6 & V-8 engines to help prevent water from backing into the manifold and engine swivel design and is sold in pairs If your flapper currently has round grommets that hold it in, and a 4 inch Y-Pipe, then this is the correct flapper If your current flapper is held in with square grommets, then you can remove the round exhaust ring and use the included grommets. Does Not Fit 4.3 Engines Originally Equipped with the 1 Piece Exhaust Manifold
EMP32-08303 $57.95	Exhaust Shutter (2 Per Pack) Exhaust Shutter (2 Per Pack) OEM: MercuryReplaces: Mercury 807166A3 | 14348A1 | 14348A2 | 14348 For 1982-98 MC-1/R/MR/Alpha One, Alpha Gen II & Bravo exhaust bellows. also crosses with:Sierra: 18-2732-9 GLM: 89170 Mallory: 9-42802
GLM89175 $49.95	Shutter Water Exhaust Flapper for Mercruiser 4 Inch Y Pipe V6 V8 807166A1 4 Inch Water Shutter that fits many Mercruiser applications. It is 2-1/2" wide and 6-1/8" long This valve has a butterfly action and comes with 2 grommets. Sold as Each. If your flapper currently has square grommets that hold it in, and a 4 inch Y-Pipe, then this is the correct flapper (except 4.3L with 1-Piece Manifold System) If your current flapper is held in with round grommets, then you need BPI89170 or MAL9-42802
SIE18-2732 $16.95	Shutter Water Flapper Exhaust Y Pipe for Mercruiser 807166A3 Exhaust Water Shutter Flapper for 4 Inch Y pipe used on Mercruiser. Fits into the "Y" Pipe on most V-6 & V-8 engines to help prevent water from backing into the manifold and engine swivel design and is sold in pairs If your flapper currently has round grommets that hold it in, and a 4 inch Y-Pipe, then this is the correct flapper If your current flapper is held in with square grommets, then you need MER807166A1 Replaces Mercruiser OEM # 807166A3 Does Not Fit 4.3 Engines Originally Equipped with the 1 Piece Exhaust Manifold
MER807166A2 $64.95	Shutter Water Exhaust Flapper Y Pipe Mercruiser V6 for 1 Piece Manifold System Water Shutter Kit for Mercruiser V6 with 1 piece Y-Pipe manifolds. Only fits Y pipe used with original 1 piece exhaust manifold. IF you have converted to the two piece manifold and your application had the 1 piece originally this is the shutter you need. Genuine Mercury Marine Quicksilver original equipment part # 807166A 2