Cometic Honda Civic 1.7L D171 76mm .027 inch MLS Head Gasket D17 2012-gmc-sierra-2500-hd-esi4999335 "text":"These headers are compatible with

"text":"These headers are compatible with the 6

A series of Viton O-rings and the appropriate standoff extensions are included with each kit to ensure a leak-free seal and OEM fit and finish

internal bores and -8 AN o-ring thread

1992-2000 GMC K2500 Sierra SLE 1994-2000 GMC K2500 Sierra SLT 1988-1990

Cometic Honda Civic 1.7L D171 76mm .027 inch MLS Head Gasket D17 2012-gmc-sierra-2500-hd-esi4999335 "text":"These headers are compatible withComprised of multiple embossed layers of stainless steel with the outer layers utilizing a Viton rubber coating. Compressed operating thickness is 0. 027". Cometic MLS (Multi Layer Steel) Head Gaskets provide maximum sealing performance for todays high output engines and require no sealants. MLS gaskets are ideal for both aluminum heads to aluminum blocks and aluminum heads to cast iron blocks. They can withstand the shearing force created by the two