What are all the stock components of a North American GTS exhaust? are there normally 2 cats or 1. Im just wondering because Ive always thought there was just 1 cat after the flex pipe, but with the option to buy a downpipe, don't they usually replace a cat?
Exhaust Mani > Downpipe > Flexpipe > Cat > Midpipe > Muffler - And 2- 02 Sensors. 7-8 Rubber dounuts. Replacing the Cat is optional, In California we have the worst Emissons law- It is very common to replace the Cat when doing any muffler replacement. If your wanting to replace the Cat just stick with an A/M setup.
