5S-FE MK2 Non-Turbo Engine Aftermarket Exhaust note question [Archive] - Toyota MR2 Message Board

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Hi guys I have a 91 NA and I recently bought a used Greddy SP in good shape on Ebay. It was just the Muffler without the Cat-back piping because the seller decided that was too much to ship. So I had it install in a local muffler shop. It sounds very quiet, it is as quite as the stock one. I knew that the Sp are quiet but I dont think is that quiet. So my questions are these: -Does the rest of the cat-back piping that I did not get make any difference in sound?(down pipe, flex pipe,