I was thinking of getting longtubes for my car I have a supercharged 98GT and i got quoted 200 for labor which i thought was pretty good. I am wondering what kind of gains can i expect and what other modification i will need. Currently i have a off road h pipe 2.5 and its a MAC. Will that fit on the LT's or am i going to have to get something else to fit the LT"S. Thanks to all who reply.
Anthony
Anthony
