4" Mercruiser exhaust riser 7 degree V6-V8 1987-2001

4.3, 5.0 and 5.7 liter GM risers for V6 / V8 exhaust manifolds

Last updated on 11/7/2023

Riser for Mercruiser and Alpha One GM / Chevy motors
Can be used with exhaust manifold P/N 51230 or P/N 51220, V6 and V8
4 inch outlet length, cast iron with improved casting
For 185, 205, 262, 200, 228, 230, 898 and 260 models
V6 and V8 4.3, 5.0, 5.7 and 7.4 liter applications
Riser has 7 degree angle with 4″ O.D. Years 1987 to 2001
Manifold and riser have 3 year warranty from GLM Marine
Mercruiser manifold or riser exploded view drawings click here

4" Mercruiser exhaust riser

51140 Mercruiser 4 inch GM Chevy OEM 807988Q03

P/N 51140 4 inch riser / elbow assembly – Replaces Mercury 807988Q03. Includes installation screws and gasket.

V6 and V8 4.3, 5.0, 5.7 and 7.4 liter applications
Riser has 7 degree angle with 4″ O.D.
Years 1987 to 2001

$143.95 US

$ 268.89 CDN

Included

P/N 51140 Cast iron elbow / 807988Q03
P/N 22381 Screw / 10-43749 x 4
P/N 30240 Riser gasket / 27-863724
P/N 21892 Steel plug / 22-41622

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