Originally Posted by felixthecat
As you know you have the sport edition, hence a little freer flowing system. As you have read many times people delete or remove the ''lunch box'' muffler which the st doesn't have. The stealth muffler is bigger in length & diameter so it would muffle better & it also flows better. If your looking for a cheap fix the quiet down your exhaust, you could add a resonator where the lunch box muffler would go. The aftermarket exhaust people= like magna-flow put a lot time & energy in there products. I have added a Borla system yrs ago & if I was to do it now, I'd get Fwerk's system w/ the stealth. Just to add it is a 4cylinder motor w/ a 1 3 4 2 firing order. Listen to a Subie motor= a boomy tone, maybe not loud but boomy. You are doing to a have a different tone at a certain rpms.
I'd like to maintain the volume but increase performance slightly.