What to do
Does the performance pac include headers? if not those are always a good mod
https://ls1tech.com/forums/new-ls1-owners-newbie-tech/361959-so-you-wanna-fast.html
Is the car an auto or manual? If its an auto deffently get a stall converter.
For an M6, headers/ypipe, catback, shifter, LS6 intake
^^ that should get you a good start, the mods you do are only limited by your budget and imagination
BTW if it's an M6 be careful launching hard on those sticky tires, you might be looking for a new rear end


