Ok I am about 2 install my new Borla Stingers on to my 02 GT. I was looking at the directions and it said 2 cut the old pipes off. What I need 2 know it how much to leave of the old pipe, so I can put the new ones on. I am putting it on tomorrow.

 

If i was you get the car up in the air and put the new unit up to mark where it should be cut and give yourself 2-3 inches more for overlap for the clamp hope that helps

 

it's better to leave too much than cut too much, cuz if too much comes off then you're screwed...