Will this Header to exhaust set up rasp???
Maryland Speed was good enough to take back the ORY and replace it with Kooks high flow catted Y.
There is no significant power loss with Highflow cats.
That's my experience. I can't speak for the Dynomax.
btw, once I cammed the motor, the Corsa was too loud. I now have a Magnaflow.
On the other hand I'm running Kooks LT's, Kooks Catted Y and Hooker Aerochamber and even with the TRex+Heads my car is nice and tame with a nice deep sound when on the throttle, no rasp at all.
Just out of curiosity, judging by your sig you don't really specify weather you have a cam installed or is it on the way, if you do what cam is it. It def make a huge difference in how the car will sound
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@Ronny 02 WS6, Did you modify the stock heads with springs, stands and pushrods only. Why?
I personally DD it with the exhaust dumped at the axle and love it.





