I had Dave at Roanoke Motors install the Corsa Track system on my '03 six weeks ago. He had to cut off the second (distal) cat to get it all in there. The rest is stock. The system does expand, but manages to stay 0.25 inch or so from the paint. With my 19 year old son, I drove the car 700...
The track system is 3 inches all the way through except at the inlet where it necks down to 2.5 inches to mate with the tube coming off the convertors.
I had the corsa track system istalled. The guy who did it removed the secondary catalyic convertors. He wasn't easily able to fit 3 inch high flow convertors on in front of the mufflers, so we deleted them. My goal was to decrease heat and to get a sound with more pop in it.. The car does...
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