My SpinTech mufflers arrived today. I had them custom made in 304 stainless with 5 spin traps instead of the normal 6 traps. Some of the baffling on the side of the muffler casing was also left out. This should put the sound level somewhere between a Sportsman muffler and a Pro Street muffler design. I went with the Sportsman case size to match the size of the Hooker V304 mufflers that came with the exhaust system. The overall muffler length and inlet/outlet offset of the two muffler designs is identical so they should bolt right up. The Hooker mufflers are also very nicely constructed, but I had my heart set on a chambered-style exhaust note.
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