Big Block Stainless Steel "SA" Risers 

Big Block std. Stainless steel "SA" riser pipes are designed for Mercruiser Silent Choice, Corsa Quick and Quiet (with modifications), and IMCO's Sound Advantage systems. 3/4"npt fitting is used on front of pipe for thermostat housing that have (4) 1" hoses water to go to exhaust manifolds if needed click on (ADD BUNG). Shift bracket, ECM, or EFI brackets available as bolt on or welded to the risers.To order see PowerFlow Accessories or Related Products. pipes can also be used with our Aluminum "S" pipes part number 02-1225 for under swim step applications. (Sold in pairs)

When using these risers it's best to order 2 each 02-2242 oval hoses for the wishbone connection.