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The main difference is that there is an open area under the plenum chamber
Cast Aluminum Valve Covers
This feature is sometimes called an air gap design
Speedmaster cast iron brake calipers are designed for 13" corvette conversion kits made by PCE
When good looks are important
7.900" Chromoly Heat-Treated 5/16" 0.080" Wall DNA® One-Piece Pushrods The main difference is thatGet all of the performance that your engine can produce with these durable pushrods designed especially for high lift cams. Speedmaster pushrods are available in both 5 16 in. and 3 8 in. diameters. They feature . 080 in. wall thickness and are formed from 4130 chromoly steel. These one piece Speedmaster pushrods are heat treated for use with guideplates. They have a minimum wall thickness of . 080 in. to handle higher rpm, plus a black oxide finish.
