4" Riser for a Mercruiser. It will fit all V-6 & V 8 GM Engines with a Center Riser Exhaust from 1987 & Up (except Dry Joint). This riser fits GLM # 51220, Barr # MC-1-99746, Osco # 7114B, Barr # MC-1-87114,  Osco # 9011, and Barr # MC-1-89011 manifolds. Includes gasket and mounting hardware. This riser replaces Mercury Quicksilver #s: 44354, 44354A3, 807914, 807988A03, 807988, 807988A2; Osco # 4354; GLM # 51140; Sierra # 18-1976-1; Mallory # 9-40559

Barr Manifolds and Risers come with a 3-year limited warranty (PDF)!

Exhaust Riser Elbow for Center Riser Manifolds on Mercruiser Sterndrives.

3.0 Inch outlet and a 15° down angle. This was used from 1983 thru 1986 on V6 & V8 engines.

Replaces Mercruiser # 98504A3
Osco # 8503A
GLM # 51110
Sierra # 18-1970-1
Mallory # 9-40557

Barr Manifolds and Risers come with a 3-year limited warranty (PDF)!

Cast iron Exhaust Riser For Mercruisers. It comes with the Riser and the mounting bolts. It is used on all Mercruiser Center riser applications (V6 & V8) with a 4" riser. 4 Inch riser refers to the exhaust hose size that fits on the riser itself. Generally any from 1986 to 2002. Note: 1986 was a Transition Year, and some applications had 3" risers.

Barr Cast Iron Manifolds and Risers come with a 3-year limited warranty (PDF)!

Riser for a Mercruiser. It has a 3.0" outlet with 0° down angle and is used on Center Riser applications for V8 engines. This riser is generally used with inboard applications and is a Direct replacement for Mercruiser Quicksilver original equipment part # 98502A2; Mallory # 9-40554; GLM # 51192; Sierra # 18-1974-1.
Fits Mercruiser 185R, 185MR, 205R 205MR GM 229 and 262 V6; 230 MIE (4 BBL) GM 305 V8 1981-1986; 260 MIE GM 350 V8 1981-1986; 340 MIE with Borg Warner GM 454 V8 1981-1987; 7.4L MIE with Borg Warner GM 454 V8 1988-1992
Riser gasket and mounting hardware are included. This Riser can use OSC8503-GR, OSC8503-GB, or OSC8503-GO Riser gaskets.
Barr Manifolds and Risers come with a 3-year limited warranty (PDF)!