Considering the lack of funds that I currently poses I am pretty happy with the performance I am getting out of my 2 1/2" turbo back exhaust system i have been assembling for some time .... I started by buying a downpipe from www.punishmentracing.com 2 1/2 inch press bent (I know they say mandrel is better but for 130$ shipped including test pipe I couldnt pass it up) then I purchased a Greddy Style OBX Racing muffler for 75$ shipped.....I took all this to a local muffler shop who made the pipe from test pipe to muffler and installed it all for me for 150.00$$ totalling 355.00 $ installed ..... The car is definately running alot stronger and sounds awsome .....