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Exhaust diffuser '04-'07
The exhaust is way too noisy with the exhaust diffuser removed and too restrictive with it installed. I modified the exhaust diffuser by drilling an 11/16" hole in the inboard end. The exhaust now has a pleasant note but is still very quiet. (Remove the torx bolt at the rear of the muffler to remove the diffuser.) The diffuser shown fits the '04-'07 muffler; for '08 and newer, see the pictures and notes to the right -->