Ok so when I bought my Greddy muffler from RRM I took it to a local exhaust shop and had them run 2.25 inch pipe from the testpipe back. Well they done a crappy job for $80. This was about 2 months ago. Here last week I had a different shop replace my testpipe with my stock cat because it sounded like crap once I got the RRM header. The guy at the new shop was like "Who ran this pipe for you, they done a shi%y job" so I got him to replace my cat, (he had to weld on a new flange cause the other shop cut it off the testpipe) and run more pipe for $80. Its a lot better cause this time there are only two pieces unlike last time. Anyways I am very pleased with the sound with the cat on and now my car sounds like heaven. Here are some pics.

 

nice, my exhaust isnt loud enough.... i think i should take out that little muffler thats right after the cat.... would that make it sound like **** or no?

 

Thats the resonator and thats why lancermans exhaust sounded like garbage with header, TP, catback. The resonator takes the edge off the exhaust sound.

 

looks kind of skinny to be a resonator. Mine is fat. Nice piping work too.. looks good!

I got the same setup, just no TP. RRm header, resonator, catback. Mine isn't loud at all. There's some-days it gets lounder than others... guess it all depends how lean or rich the car is running.

 

OZRallyMatty was talking about cutting it out. Lancerman doesn't have one at all.

 

Yeah a resonator will keep it from getting raspy and sounding like a coffee can. I might have one put in later.