Hey Ant.....I see in your description of your vehicle, you have a 3" downpipe and 3" exhaust. If I am understanding this right, the down pipe your referring to is one to replace the cat. If I am wrong.......disregard this. If I'm right, I thought that any one whom replaces the cat would bring on an engine light due to the computer not seeing any diff. from the sensors which would be mounted on the inlet and outlet sides of the cat. Any info on this ???? I am thinking about doing this on my GT. Thanks.
