update... i just got a set of SD headers and they are great. the gaskets that came with it mounted and fit perfect on my 98 L36. the cross over pipe fits nice and tight... almost too tight as it is hard to assemble on the engine but would rather fight to get it in and know it is sealed. i will be going back and upgrading the clamps, as even if the crappy U clamps work i just dont like them! but after reading about how loose the pacesetter pipes were and the sealing issues... its good to see these fit great.
