Exhaust improvement question

[zuni]

Originally Posted by IHateHacks

A test pipe is a 3" straight pipe with toyota flanges that replaces the main catalytic convertor.

And he is right, having a stock cat will keep the loudness down, along with the nasty'ness.

You have a non-turbo so unless it was a cali car when it was sold brand new, you don't have a pre-cat, which is another big time restriction on turbo cars.

where is the pre cat located.