Specification: Condition:100% Brand New Colour:Silver Material:Aluminum Height-3 3/4", will clear most valvetrain combinations. Thick 1/4" billet rail. Without baffled breather holes. Features:Tall style (will clear roller rockers & stud girdles). Product Compatibility:Compatible with Chevy Small Block 1987-1997 TBI and Vortec Heads 5.0L/305 and 5.7L/350 (center bolt pattern) and most aftermarket 23-degree heads. Package includes: Includes the necessary long bolts.