318 dodge polysphere parts 10.35K 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. You are viewing 1 out of 1 answers, click here to view all answers. Register or Login Offenhauser Sales Corp, 5300 Alhambra Avenue, Los Angeles, CA 90032 Phone: (323) 225-1307