Tally TransAm

iTrader: (17)

Im ordering the gaskets and studs to tear down my motor on fri and im getting conflicting details on which head gaskets i need

Motor is a 1999 ls1 and i will be using 317 heads

i have been told since it is a 99 i will need the graphite gaskets, but how will they hold up to 10-12 psi

i would like the mls but have been told it wouldnt work with my block, then i have also been told you need the 6 liter mls gaskets with the 317's

can anyone answer this 100% for me, a GM part number would be great

thanks a lot

Hershey Squirt

iTrader: (6)

6.0 mls, the graphite ones are needed with the "notch" heads.