These add an additional 0.54 of internal clearance over factory height valve covers. The valve covers have integrated angled coil mounts, and the hi-tech look and performance of coil-on-cover applications.
Fits LS1, LS2, LS6 engines using coils with a standard LS3 bolt spacing of 72mm. These valve covers come ready for installation with an style baffle and ventilation system, lengthened factory style mounting hardware, plus a billet aluminum oil fill cap.

Features:

Application: GM LS Engines
Material: Aluminum
Product Type: Valve Covers
Angled Coil Mounts Deliver A Smooth Clean Look
Retain The High-Tech Look And Performance Of Coil On Cover
Eliminates Unsightly OE Style Coil Brackets
Includes mounting hardware, gaskets, and oil fill cap. 
Fits All LS Engines Using LS1, LS2, LS3, LS6 And LS7 Or Similar Coils With Spacing 72mm Bolt Spacing
Designed To Add An Additional 0.54" If Of Internal Clearance Over Factory Height Valve Covers

Package included:(as the pictures show)
one pair of Valve Covers
mounting hardware
gaskets
oil fill cap