Big Block std. Stainless steel "S" pipe is unique in many ways. These pipes will fit many pre-existing port locations That are about crankshaft center line, and is widely used with swim step applications as well as V-Drives and Jet boats.the lower elbow is adjustable up & down with a 4" exhaust tip hose contention.

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. (Sold in pairs)

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.

Big Block 3" Stainless Steel "SA" Riser Pipes (Pictured with optional bung)

Big Block 3" Stainless steel "SA" riser pipes are designed to replace stock Mercruiser Bravo exhaust with 3" riser block between manifold & Riser. 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. They can also be used with our Aluminum "S" pipes part number 02-1225 for under swim step applications. (Sold in pairs)

Delco 4 & 6-Cylinder Tune-Up Kit replaces MerCruiser part # 34235Q1

Kit Contains:

Mercruiser 5" diameter 454 rear mounted replacement exchanger. This part fits 4 – 6 cylinder. Replaces Mercruiser OEM part #61086.

Wear Plate replaces Johnson/Evinrude part # 318995

Carburetor Float (Rochester 1-Barrel) replaces MerCruiser part # 1397-2610

SCREW (Priced Each. Must sell in quantities of 5) Mercruiser 10-19926100

Supersedes: 10-76566

GASKET Mercruiser 27-882610

COTTER PIN Mercruiser 18-81502610