Designed for 1992 & later 5.2L (318 c.i.d.) and 1993 & later 5.9L (360 c.i.d.) Chrysler Magnum V8s, the Performer RPM Chrysler Magnum heads give substantial performance improvements for street/strip and off-road performance use. They offer an easy bolt-on upgrade for these modern engines with substantial out-of-the-box performance gains. Stock Magnum intake and exhaust flange and port locations make this an ideal choice for use with stock equipment as well as the new RPM Air-Gap manifold #7577. These heads feature 176cc intake ports and 75cc exhaust ports with 58cc combustion chambers for a slight increase in compression over the factory heads. 2.02" intake and 1.60" exhaust valves with 11/32" stems offer more flow than stock and they accept adjustable aftermarket rocker arms. Sold individually and requires hardened push rods. Match with our new Air-Gap manifold.