Pair of Shutter Water Flappers Exhaust Y Pipe for Mercruiser BPI89170 replaces 807166A3 Exhaust Water Shutter Flapper for 4 Inch Y pipe used on Mercruiser. 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 Fits these models: Mercruiser 185 2 BBL. GM 1985 Serial #s 0A331455 - 0B527954 Mercruiser 205 4 BBL. GM 1985 Serial #s 0A331455 - 0B527954 Mercruiser 185 2 BBL. GM 1986 Serial #s 0A331455 - 0B527954 Mercruiser 205 4 BBL. GM 1986 Serial #s 0A331455 - 0B527954 Mercruiser 260 GM 1987 Serial #s 0B525982 - 0B773304 Mercruiser 230 4 BBL. GM 1987 Serial #s 0B525982 - 0B773739 Mercruiser 260 4 BBL. GM 1987 Serial #s 0B525982 - 0B773739 Mercruiser 200 2 BBL. GM 1987 Serial #s 0B525982 - 0B774444 Mercruiser 5.7L GM 1988 Serial #s 0B525982 - 0F600999 Mercruiser 5.7L GM 1989 Serial #s 0B525982 - 0F600999 Mercruiser 5.7L GM 1990 Serial #s 0B525982 - 0F600999 Mercruiser 5.7L GM 1991 Serial #s 0B525982 - 0F600999 Mercruiser 5.7L GM 1992 Serial #s 0B525982 - 0F600999 Mercruiser 5.7L GM 1993 Serial #s 0B525982 - 0F600999 Mercruiser 5.7L GM 1994 Serial #s 0B525982 - 0F600999 Mercruiser 5.7L GM 1995 Serial #s 0B525982 - 0F600999 Mercruiser 175 2 BBL. GM 1987 Serial #s 0B527955 - 0B773242 Mercruiser 205 4 BBL. GM 1987 Serial #s 0B527955 - 0B775129 Mercruiser 7.4L BRAVO GM 454 1988 Serial #s 0B771113 - 0D603117 Mercruiser 7.4L BRAVO GM 454 1989 Serial #s 0B771113 - 0D603117 Mercruiser 7.4L BRAVO GM 454 1990 Serial #s 0B771113 - 0D603117 Mercruiser 7.4L BRAVO GM 454 1991 Serial #s 0B771113 - 0D603117 Mercruiser 4.3L 2 BBL. GM 262 1988 Serial #s 0B773243 - 0D714106 Mercruiser 4.3L 2 BBL. GM 262 1989 Serial #s 0B773243 - 0D714106 Mercruiser 4.3L 2 BBL. GM 262 1990 Serial #s 0B773243 - 0D714106 Mercruiser 4.3L 2 BBL. GM 262 1991 Serial #s 0B773243 - 0D714106 Mercruiser 4.3L 2 BBL. GM 262 1992 Serial #s 0B773243 - 0D714106 Mercruiser 5.0LX 4 BBL. GM 1988 Serial #s 0B773740 - 0F600999 Mercruiser 5.0LX 4 BBL. GM 1989 Serial #s 0B773740 - 0F600999 Mercruiser 5.0LX 4 BBL. GM 1990 Serial #s 0B773740 - 0F600999 Mercruiser 5.0LX 4 BBL. GM 1991 Serial #s 0B773740 - 0F600999 Mercruiser 5.0LX 4 BBL. GM 1992 Serial #s 0B773740 - 0F600999 Mercruiser 5.0LX 4 BBL. GM 1993 Serial #s 0B773740 - 0F600999 Mercruiser 5.0LX 4 BBL. GM 1994 Serial #s 0B773740 - 0F600999 Mercruiser 5.0LX 4 BBL. GM 1995 Serial #s 0B773740 - 0F600999 Mercruiser 5.0L 2 BBL. GM 1988 Serial #s 0B774445 - 0F600999 Mercruiser 5.0L 2 BBL. GM 1989 Serial #s 0B774445 - 0F600999 Mercruiser 5.0L 2 BBL. GM 1990 Serial #s 0B774445 - 0F600999 Mercruiser 5.0L 2 BBL. GM 1991 Serial #s 0B774445 - 0F600999 Mercruiser 5.0L 2 BBL. GM 1992 Serial #s 0B774445 - 0F600999 Mercruiser 5.0L 2 BBL. GM 1993 Serial #s 0B774445 - 0F600999 Mercruiser 5.0L 2 BBL. GM 1994 Serial #s 0B774445 - 0F600999 Mercruiser 5.0L 2 BBL. GM 1995 Serial #s 0B774445 - 0F600999 Mercruiser 4.3LX 4 BBL. GM 1988 205 HP Serial #s 0B775130 - 0D714369 Mercruiser 4.3LX 4 BBL. GM 1989 205 HP Serial #s 0B775130 - 0D714369 Mercruiser 4.3LX 4 BBL. GM 1990 205 HP Serial #s 0B775130 - 0D714369 Mercruiser 4.3LX 4 BBL. GM 1991 205 HP Serial #s 0B775130 - 0D714369 Mercruiser 4.3LX 4 BBL. GM 1992 205 HP Serial #s 0B775130 - 0D714369 Mercruiser 530 D-TA (BRAVO MIE) VM 183 1989 Serial #s 0B993002 - 0D725151 Mercruiser D183 TURBO AC (MCM MIE) VM 183 1990 Serial #s 0B993002 - 0D725151 Mercruiser D183 TURBO AC (MCM MIE) VM 183 1991 Serial #s 0B993002 - 0D725151 Mercruiser D183 TURBO AC (MCM MIE) VM 183 1992 Serial #s 0B993002 - 0D725151 Mercruiser D183 TURBO AC (MCM MIE) VM 183 1993 Serial #s 0B993002 - 0D725151 Mercruiser 636 D-TA (BRAVO MIE) VM 219 1989 Serial #s 0B993002 - 0D850127 Mercruiser D219 TURBO AC (MCM MIE) VM 219 1990 Serial #s 0B993002 - 0D850127 Mercruiser D219 TURBO AC (MCM MIE) VM 219 1991 Serial #s 0B993002 - 0D850127 Mercruiser D219 TURBO AC (MCM MIE) VM 219 1992 Serial #s 0B993002 - 0D850127 Mercruiser D219 TURBO AC (MCM MIE) VM 219 1993 Serial #s 0B993002 - 0D850127 Mercruiser D254 TURBO AC VM 254 1990 Serial #s 0C849461 - 0D554731 Mercruiser D254 TURBO AC BRAVO VM 254 1990 Serial #s 0C849461 - 0D554731 Mercruiser D254 TURBO AC VM 254 1991 Serial #s 0C849461 - 0D554731 Mercruiser D254 TURBO AC BRAVO VM 254 1991 Serial #s 0C849461 - 0D554731 Mercruiser D254 TURBO AC VM 254 1992 Serial #s 0C849461 - 0D554731 Mercruiser D254 TURBO AC BRAVO VM 254 1992 Serial #s 0C849461 - 0D554731 Mercruiser D254 TURBO AC VM 254 1993 Serial #s 0C849461 - 0D554731 Mercruiser D254 TURBO AC BRAVO VM 254 1993 Serial #s 0C849461 - 0D554731 Mercruiser D4.2L/220 IDI VM 254 1994 Serial #s 0D554732 - 0M999999 Mercruiser D4.2L/220 IDI VM 254 1995 Serial #s 0D554732 - 0M999999 Mercruiser D4.2L/220 IDI VM 254 1996 Serial #s 0D554732 - 0M999999 Mercruiser D4.2L/220 IDI VM 254 1997 Serial #s 0D554732 - 0M999999 Mercruiser D4.2L/220 IDI VM 254 1998 Serial #s 0D554732 - 0M999999 Mercruiser 7.4L BRAVO GEN. V GM 1992 Serial #s 0D603118 - 0F800699 Mercruiser 7.4L BRAVO GEN. V GM 1993 Serial #s 0D603118 - 0F800699 Mercruiser 7.4L BRAVO GEN. V GM 1994 Serial #s 0D603118 - 0F800699 Mercruiser 7.4L BRAVO GEN. V GM 1995 Serial #s 0D603118 - 0F800699 Mercruiser 7.4L BRAVO GEN. V GM 1996 Serial #s 0D603118 - 0F800699 Mercruiser 4.3L (GEN II) 2 BBL. GM 1992 Serial #s 0D714107 - 0F000877 Mercruiser 4.3L (GEN II) 2 BBL. GM 1993 Serial #s 0D714107 - 0F000877 Mercruiser 4.3LX GEN II 4 BBL. GM 1992 Serial #s 0D714370 - 0F001219 Mercruiser 4.3LX GEN II 4 BBL. GM 1993 Serial #s 0D714370 - 0F001219 Mercruiser D3.0L BRAVO VM 183 1994 Serial #s 0D725152 up Mercruiser D3.0L VM 183 1994 Serial #s 0D725152 up Mercruiser D3.0L BRAVO VM 183 1995 Serial #s 0D725152 up Mercruiser D3.0L VM 183 1995 Serial #s 0D725152 up Mercruiser D3.0L BRAVO VM 183 1996 Serial #s 0D725152 up Mercruiser D3.0L VM 183 1996 Serial #s 0D725152 up Mercruiser D3.6L VM 219 1994 Serial #s 0D850128 up Mercruiser D3.6L BRAVO VM 219 1994 Serial #s 0D850128 up Mercruiser D3.6L VM 219 1995 Serial #s 0D850128 up Mercruiser D3.6L BRAVO VM 219 1995 Serial #s 0D850128 up Mercruiser D3.6L VM 219 1996 Serial #s 0D850128 up Mercruiser D3.6L BRAVO VM 219 1996 Serial #s 0D850128 up Mercruiser 4.3L (GEN II) 2 BBL. GM 1993 Serial #s 0F000878 - 0F601126 Mercruiser 4.3L (GEN II) 2 BBL. GM 1994 Serial #s 0F000878 - 0F601126 Mercruiser 4.3L (GEN II) 2 BBL. GM 1995 Serial #s 0F000878 - 0F601126 Mercruiser 4.3LX GEN II 4 BBL. GM 1993 Serial #s 0F001220 - 0F601126 Mercruiser 4.3LX GEN II 4 BBL. GM 1994 Serial #s 0F001220 - 0F601126 Mercruiser 4.3LX GEN II 4 BBL. GM 1995 Serial #s 0F001220 - 0F601126 Mercruiser 5.7L BRAVO EFI (TBI) GM 1995 Serial #s 0F225560 - 0F752399 Mercruiser 5.7L ALPHA EFI (TBI) GM 1995 Serial #s 0F355305 - 0F752389 Mercruiser 350 MAG BRAVO MPI GM 1995 Serial #s 0F415189 - 0F601999 Mercruiser 228 4 BBL. GM 1982 Serial #s 6218462 - 0B525981 Mercruiser 260 GM 1982 Serial #s 6218462 - 0B525981 Mercruiser 260 4 BBL. GM 1982 Serial #s 6218462 - 0B525981 Mercruiser 228 4 BBL. GM 1983 Serial #s 6218462 - 0B525981 Mercruiser 260 GM 1983 Serial #s 6218462 - 0B525981 Mercruiser 260 4 BBL. GM 1983 Serial #s 6218462 - 0B525981 Mercruiser 898 2 BBL. GM 1983 Serial #s 6218462 - 0B525981 Mercruiser 228 4 BBL. GM 1984 Serial #s 6218462 - 0B525981 Mercruiser 260 GM 1984 Serial #s 6218462 - 0B525981 Mercruiser 260 4 BBL. GM 1984 Serial #s 6218462 - 0B525981 Mercruiser 898 2 BBL. GM 1984 Serial #s 6218462 - 0B525981 Mercruiser 230 4 BBL. GM 1985 Serial #s 6218462 - 0B525981 Mercruiser 260 GM 1985 Serial #s 6218462 - 0B525981 Mercruiser 260 4 BBL. GM 1985 Serial #s 6218462 - 0B525981 Mercruiser 230 4 BBL. GM 1986 Serial #s 6218462 - 0B525981 Mercruiser 260 GM 1986 Serial #s 6218462 - 0B525981 Mercruiser 260 4 BBL. GM 1986 Serial #s 6218462 - 0B525981 Mercruiser 185 2BBL. GM 1987 Serial #s 0A331455 - 0B527954 Mercruiser 205 4 BBL 262 V6 1987 Serial #s 0A331455 - 0B527954 Mercruiser 350 MAG ALPHA GM 1987 Serial #s 0B525982 - 0F600999 Mercruiser 350 MAG ALPHA GM 1988 Serial #s 0B525982 - 0F600999 Mercruiser 350 MAG ALPHA GM 1989 Serial #s 0B525982 - 0F600999 Mercruiser 350 MAG ALPHA GM 1990 Serial #s 0B525982 - 0F600999 Mercruiser 350 MAG ALPHA GM 1991 Serial #s 0B525982 - 0F600999 Mercruiser 350 MAG ALPHA GM 1992 Serial #s 0B525982 - 0F600999 Mercruiser 350 MAG ALPHA GM 1993 Serial #s 0B525982 - 0F600999 Mercruiser 350 MAG ALPHA GM 1994 Serial #s 0B525982 - 0F600999 Mercruiser 350 MAG ALPHA GM 1995 Serial #s 0B525982 - 0F600999 Mercruiser 4.3L GEN II 2 BBL GM 262 1993 Serial #s 0F000878 - 0F601126 Mercruiser 4.3L GEN II 2 BBL GM 262 1994 Serial #s 0F000878 - 0F601126 Mercruiser 4.3L GEN II 2 BBL GM 262 1995 Serial #s 0F000878 - 0F601126 Mercruiser 454 MAG BRAVO GEN V GM 1992 Serial #s 0D805069 - 0F304999 Mercruiser 454 MAG BRAVO GEN V GM 1993 Serial #s 0D805069 - 0F304999 Mercruiser 454 MAG BRAVO GEN V GM 1994 Serial #s 0D805069 - 0F304999 Mercruiser 200 2 BBL GM 305 1985 Serial #s 6218462 - 0B525981 Mercruiser 200 2 BBL GM 305 1986 Serial #s 6218462 - 0B525981 Mercruiser 350 MAG ALPHA GM 1986 Serial #s 0A635178 - 0B525981 Mercruiser 350 MAG ALPHA GM 1987 Serial #s 0A635178 - 0B525981 Mercruiser 4.3L GEN II 2 BBL GM 262 1992 Serial #s 0D714107 - 0F000877 Mercruiser 4.3L GEN II 2 BBL GM 262 1993 Serial #s 0D714107 - 0F000877 Mercruiser 454 MAG ALPHA GM 454 1986 Serial #s 0A631894 - 0B785148 Mercruiser 454 MAG ALPHA GM 454 1987 Serial #s 0A631894 - 0B785148 Mercruiser 454 MAG ALPHA GM 454 1988 Serial #s 0A631894 - 0B785148 About Us Basic Power and its staff want you to feel 100% confident in your purchases. Here are a few reasons why: Multi-Million dollar inventory In Stock and Ready to Ship from our huge inventory Shipped Same Day when order is placed before 2pm Highly Technical staff available Tracking numbers are visible through purchase history right from your computer We sell ONLY quality marine specific parts Contact us through messaging system 14 Day No Hassle Returns Ships best way via USPS or UPS Shipping Shipping rates of $12 and less are eligible for combined shipping. Items with $13 or more shipping cannot have the shipping costs combined. Our normal handling time is 1-2 days. Payment We accept payment by any of the following methods: PayPal Please pay as soon as possible after winning an sale, as that will allow us to post your item to you sooner! Returns You can message us through to obtain your RMA number to authorize your return with the 14 day period. Returned items must be in the original unopened packaging in new condition within 14 days of purchase. Buyer is responsible for all shipping costs. All returns will incur a 20% restocking fee. 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