318 dodge polysphere parts 10.30K viewsNovember 17, 2016 0 Scootr-the-pinstriper November 16, 2016 0 Comments Are intake manifolds and valve covers available for 318 Mopar polysphere engines? 1 Answer ActiveVotedNewestOldest 0 DMarv Posted November 20, 2016 0 Comments Thanks for your question. Unfortunately Offenhauser does not make an intake manifold or valve covers for the 318 Poly engines. Register or Login Offenhauser Sales Corp, 5300 Alhambra Avenue, Los Angeles, CA 90032 Phone: (323) 225-1307