idk, my buddys 99 gtp, has a catback with flowmasters, and even with my headers, no cat, no res. and 2.5 inch to the rear is still quieter, less drone.
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06-16-2009
idk, my buddys 99 gtp, has a catback with flowmasters, and even with my headers, no cat, no res. and 2.5 inch to the rear is still quieter, less drone.
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