BBK 1404 Premium Exhaust Header Gaskets Set for Chevrolet GM LS1, 4.8L, 5.3L, 5.7L, 6.0L, 6.2L BBK is your Number One Aftermarket Performance Brand in the USA - American Designed and Built Premium Graphite Material Ensures Leak Free Seal Every Time Port Matched For Optimum Flow of All Exhaust Headers Designed for Higher Temperature Performance Applications Sold as a Pair