Brodix Big Block Chevy Dragon Slayer Series Aluminum Cylinder Heads

These cylinder heads accept all standard pistons, intake manifolds, and rocker arms. The exhaust ports are raised .600'' higher than stock. Valve cover rails are now raised to assure no oil leakage. Every casting is poured from A-356 virgin aluminum and tested before Brodix utilizes their in-house processes such as finish machining and heat treating to assure that you receive the best products for your hard-earned money. Other features include a thick deck surface that is compatible with nitrous, drilled and tapped holes on the ends for standard drive accessories, phosphorous bronze valve guides and hardened valve seats installed for unleaded fuel. Sold Individually, 1/pkg.

VALVE SPRING   Specs   1.550'' Diameter Valve Spring for Mechanical Roller Lifter Cam Spring Pressure Open: 610 lbs. Spring Pressure Closed: 255 lbs. Installed Height: 1.950'' Max Lift: .700''   1.625'' Diameter Valve Spring for Mechanical Roller Lifter Cam Spring Pressure Open: 745 lbs. Spring Pressure Closed: 250 lbs. Installed Height: 2.050'' Max Lift: .800''   1.645'' Diameter Valve Spring for Mechanical Roller Lifter Cam Spring Pressure Open: 915 lbs. Spring Pressure Closed: 315 lbs. Installed Height: 2.100'' Max Lift: .850''