421-02-6194 Mercruiser Replacement Riser (Sold in pairs) 6" taller thru transom stainless steel riser pipes fit stock Mercruiser center rise manifolds, as well as Glenwood Magnaflow manifolds. These pipes have shown a performance gain of 9 horsepower in our dyno test over stock risers. (Sold in pairs)
All kits include all necessary mounting hardware and gaskets. Weld on or Bolt on brackets for shift, ECM or EFI, see Merc Replacement Risers or Related Products.
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421-02-6197 Mercruiser Replacement Riser (Sold in pairs) 6" taller thru transom and silent choice stainless steel riser pipes fit stock Mercruiser center rise manifolds, as well as Glenwood Magnaflow manifolds. These pipes have shown a performance gain of 9 horsepower in our dyno test over stock risers. (Sold in pairs)
All kits include all necessary mounting hardware and gaskets. Weld on or Bolt on brackets for Shift, ECM or EFI, see Merc Replacements Risers or Related Products.
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421-02-6192 Mercruiser Replacement Riser Standard Ht "A" (Sold in Pairs) Standard height thru transom stainless steel riser pipes fit stock Mercruiser center rise manifolds, as well as Glenwood Magnaflow manifolds. These pipes have shown a performance gain of 9 horsepower in our dyno test over stock risers. (Sold in pairs) All kits include all necessary mounting hardware and gaskets. Weld on or Bolt on brackets available for Shift, ECM or EFI, see Merc Replacement Risers or Related Products.
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421-01-3008 IMCO Prop ShaftIMCO Prop Shaft designed as a replacement to the Mercury shaft in stock Mercury lowers.
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421-11-1001 MGK Riser GasketsMGK Riser Gasket. (Sold each)
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421-04-1255 New Style Valve Covers Polished Big Block Chevy Valve Covers.
New style valve cover with all the advantages of the previous IMCO valve covers and added pocketed area for longer rocker arm ratio's on the intake side. Top side of valve cover is flat for easy accessory installation.
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421-08-081008001 Nut Nut (1/2-13 Nylock S/S)
4 per Gimbal Steering and Trim Assembly
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421-08-080403001 Nut (10-24 Nylock S/S) Nut (10-24 Nylock S/S)
4 per Gimbal Helmet Assembly
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421-08-081712003 Nut (1-12 Nylock, Brass, #6 Shaft)
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421-08-081306003 Nut (3/4-16 Nylock, Brass)
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421-08-180803002 Nut (3/8-24 Flange Self Lock)Nut (3/8-24 Flange Self Lock)
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421-08-091105002 Nut (5/8-18 Thin Nylock) (Yoke Gear End)
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421-08-090904001 Nut (7/16-20 Nylock S/S Thin)
8 per Upper Case Assembly, 2 per Lower Case Assembly
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421-11-2144 O Ring (Alignment Spacer)
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421-11-2228 "O" Ring (Alignment Spacer)
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421-11-2344 "O" Ring (Bearing Carrier)
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421-11-2014 "O" Ring (Cooling Water Passage)
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