New Fel Pro performance gaskets. Gasket is. 030" thick. Sold as a pair (2 gaskets). You should be using a feeler gauge to ensure you need gaskets this thin.
LS1 LS2 LS6 Aluminum Intake Manifold Gasket Set FEL PRO .060 PAPER (NON O-RING)
Chevy GM LS1 LS2 LS6 215cc 60cc 6-Bolt Aluminum Bare Cylinder Head
Chevy GM LS1 LS2 LS6 190cc 60cc Aluminum Bare Cylinder Head
92mm Aluminum Ls1 Ls2 Ls6 Intake Manifold 5.3L 5.7L 6.0L W/ Throttle Body Black