My resonator developed a leak. I went to a local exhaust shop and for $129, the guy cut off my resonator, made me a new 2 and 1/4 inch pipe from the resonator back, and added a turbo muffler. The car sounds great (just a tad louder, throutier than stock) and seems to run great too. (there is also 2 and 1/4 inch pipe coming off the exhaust manifold and going to where the front of the resonator was.) Good, cheap mod!!