Difference between FEL PRO head gasket for L36 vs L67?
Poking around the Rock Auto website, I noticed the L36 calls for the FEL PRO 9917PT (left) / 9918PT (right) head gaskets. The L67 calls for the FEL PRO 9089PT (2 req'd). The L67 gasket does cost about 50% more than the L36 gasket.
Anyone know if there is any difference in the physical construction of these gaskets (L36 vs L67)? Is the L67 gasket a metal-core (vs L36 not)...perhaps even one of the new MLS gaskets FEL PRO is supposedly making now? Does the L67 gasket have some kind of sealing ring around the cylinder hole (to better seal boost)?
If the 9089PT does have some kind of advantage, any reason it wouldn't fit on an L36?
2004 Buick Lesabre Limited, Gran Touring; Bone Stock
1998 Buick Lesabre Limited, Gran Touring; Mods: Poly sway bushings/endlinks, Tru-Cool trans cooler, Thrasher shift kit (med), PLIM, front PEM; Mods in progress: Alot of stuff, but slowly...