PML Classic"Corvette" Raised Script Valve Covers for Chevy Big Blocks - Cast Aluminum Finish Higher Clearance Raised Script Valve Covers. 3/8" to 1/2" taller than standard , these covers provide relief to fit over roller rockers and look beautiful. Heavy duty cast aluminum construction with internal baffles to prevent oil leaks. Thick side walls and gasket flanges that will not bend when bolts are tightened. GM/Chevrolet and Jeep applications. Made in the U.SA. Available in several finishes.