Check out the exhaust threads for your model of car - lots of input on cat back systems, taking off the stock resonators, and lots of info on what others have experienced in the way of drone with different applications/products.
Most agree Corsa has little to no drone - lots of very positive reviews. I've got a Magnaflow system on mine. The first month it had some drone in the 1500 - 1700 RPM range, but after it "broke in" - not so much. Had it on for 4 months now and lovin it!
Most agree Corsa has little to no drone - lots of very positive reviews. I've got a Magnaflow system on mine. The first month it had some drone in the 1500 - 1700 RPM range, but after it "broke in" - not so much. Had it on for 4 months now and lovin it!