Pro Action™ 24° cylinder heads from RHS® deliver exceptional out-of-the-box performance gains to all Big Block Chevy owners. Available in both aluminum and cast iron versions, Pro Action™ heads are a tremendous performer in a variety of applications from street/strip and marine, to pulling truck and drag racing. Regardless of material choice or application, Pro Action™ heads offer more features, better flow characteristics, and superior “as cast” finished quality – ultimately yielding more HP for your Big Block Chevy!

Winning performance, superior engineering and unmatched quality are the foundations of the RHS® legacy. Grab a piece of that legacy for your engine with a new set of Pro Action™ Big Block Chevy cylinder heads.

Note: Properly selecting the correct aluminum cylinder head for an application depends on a large number of variables. Please consult with one of our sales technicians to help assist you in making the best decision for your particular application.

1” longer head bolts needed on four bottom exhaust bolt holes of each head.

PN 11012-03 PRICED PER PAIR

·        1 PAIR assembled, RHS "Pro Action" aluminum cylinder heads

·        119cc "As-Cast" combustion chambers

·        360cc rectangular intake port

·        Angle plugs

·       Stainless steel valves: 2.250" x 11/32"-stem +.250" intake, 1.880" x 11/32"-stem +.100" exhaust

·       COMP Cams #991-16 1.625" O.D. solid roller valve springs, (214# @ 1.950", max lift .750")

·      10-degree Titanium retainers

·        New locks & seals

·        3/8" pushrod guide plates

·        Spring cups

·        Extra thick deck surfaces to resist warpage

·        7/16" screw-in rocker studs

From mild-to-wild, we can put together a package to make your ride scream!