86Gram
New Member
I have a 2003 Honda Civic EX. I put a cold air intake on and then installed headers. I noticed an noticeable increase in power and was pleased. I bought an two and a half inch catback exhaust. I was told bigger exhaust would mean less restriction and better performance, I didn't notice an increase and actually thought it might be less. I don't like that raspy sound so I'm adding a resonator. I looked on the internet and saw that it shouldn't be this large diameter exhaust. So did I go to large that I lost horsepower? and if I did is there anything I can do to remedy it like making more restriction? I do have the end tailpiece cap on which it's a little restriction on it. That tailpiece is a couple inches long and I took some boiler insulation rope and wrapped around inside to quiet it down some which it did help.