Need some suggestions
Before 2 month i installed custom catback ,on my GTO (ls1 engine) with cam 224,224 .112
II feel it is very good for race use but i need lower sound than this system , anybody can give me some suggestion to reduce the sound with out losing the performance.?
The components are :X pipe 2 inc. , 2 dynomax bullet mufflers 2inc. , Y pipe 2inc. to 3 inc. and through dynomax muffler 3 inc.
Look here to the pictures

