Without any sense, I aquired two brand new mufflers thinking they were SE's and find they are catalytic 80DB mufflers for1688/1800's. They look ok on the out side being 4" but they will not fit with my plan to have a little more sound out of my 2007 103 police RK. I am looking for advise as I plan to knock out the catalystic material and see what it sounds like. Then, continue the experment until it sounds ok or I deside topitch it.

 

i have the stock se exh. and i just cut every thing off on the inside so now its just the collar that screw in the end of the pipe. I think it made a much better sound and back pressure is still in afect. I did not notice any perf. loss at all