Moroso Fabricated Aluminum Valve Covers Billet Rail for LS-1 Chevy & Coil Packs

Moroso Fabricated Aluminum Valve Covers, Billet Rail, LS-1 Chevy, With Mounting Bosses for coil packs Features One-piece Billet Rail is CNC machined from 6061-T6 Aluminum to ensure a precision flat surface for superior sealing 2.5" tall to clear aftermarket valvetrain Oil Fill Bung welded to cover, knurled cap included O-ring Seal Groove Uses stock type o-ring Application: 1999-2007 Chevy LS Based 4.8L 1999-2005 Chevy LS Based 5.3L (323 ci) 2003-2004 Chevy LS Based 5.3L (325 ci) 2006-2007 Chevy LS Based 5.3L (325 ci) 1999-2007 Chevy LS Based 6.0L