11/32 Steel Exhaust Valve Guide Upgrade for Power Adder Heads Dart 10D These are our bigger intake

These are our bigger intake port port offering and are best suited to engines running aftermarket plastic factory style manifolds

65" exhaust exceeding 300 CFM on a 4

750" fulcrum length rocker arms

Everything you would come to expect from the experience gained manufacturing and developing the world renowned 3V Cleveland heads and intakes

24" Deck Blocks

11/32 Steel Exhaust Valve Guide Upgrade for Power Adder Heads Dart 10D These are our bigger intake11 32 Steel Exhaust Valve Guide Upgrade with a K Line Valve Guide Liner insert for Power Adder cylinder heads. Steel valve guides better withstand the higher exhaust temperatures experienced in power adder applications.