Indmar 531017 Big Block Exhaust Riser Gasket

Indmar 531017 is a 4 in. exhaust riser gasket for Indmar big block applications including 454, 502, and 8.1L raw-water-cooled engines. Sources list it as an exhaust manifold-to-riser gasket used in marine exhaust service.

Indmar 531017 Big Block Exhaust Riser Gasket is listed in the Laken Water Sports marine parts catalog for online ordering and Phoenix-area pickup. Confirm fitment, availability, and pickup timing with the parts team before ordering when compatibility is critical.

Fitment notes: Exhaust riser gasket; verify Indmar big block engine and cooling configuration.