<p>This is a new pair of small block Chevrolet fabricated aluminum valve covers. Fits small block Chevrolet TBI and Vortec Heads 5.0L/305 and 5.7L/350 (center bolt pattern) and most aftermarket 23 degree heads. Height - 3 3/8", will clear most valvetrain combinations Polished finish Center bolt style Fully TIG welded aluminum cover Thick 1/4" billet rail Bolts included</p>