[dBlast]

Swap out your long tube race header for the stock header and cat for the test and then swap back after the test.

If you don't have the stock stuff laying around, HardkOre has my stock cat that I am sure he'll let you borrow. I can lend you my stock header.

I passed recently with my SVT header setup with RT cat in the stock SVT cat locatation just before the flex under the oil pan. I made an appointment in the middle of the day with a small shop. An hour before the appointment I took the car for a long drive to get it nice and hot and then brought it to the shop. They took me right away.

I passed.

I know that my tune is set a little rich right now and surely would have failed if I brought in my car cold. I can sniff it with my snoz when I first start up. It smells like a '60s (pre-cat) car.