i went to the exhaust shop today, they said if i just replace the resonator with H pipe, it might not sounds good, and my factory exhaust is 2.25' pipe, they suggested a new 3' cat-back system to me as well.
properly won't be too much different in performance gain tho, but i prefer the sound of H pipe rather than X pipe which most of the exhaust system has
i went to the exhaust shop today, they said if i just replace the resonator with H pipe, it might not sounds good, and my factory exhaust is 2.25' pipe, they suggested a new 3' cat-back system to me as well.
properly won't be too much different in performance gain tho, but i prefer the sound of H pipe rather than X pipe which most of the exhaust system has
You have X pipes on your stock exhaust?what year commodore?