
Sierra 18-1903 OMC Port Exhaust Manifold Fits most GM V8 Small Blocks with End Riser. Sierra replacement engine parts are manufactured to meet or exceed OEM requirements. Use with: 18-1921...
Sierra 18-8534 Exhaust Elbow Mounting Kit
Sierra replacement exhaust elbow mounting kit for use on OMC GM Small Block engines.
Use with: 18-1921 Elbow
Interchangeable with:
California Residents:
WARNING
Cancer and Reproductive Harm -
P65Warnings.ca.gov