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42 Posts
OK, I finally finished the 2 inch (SHOT GUN) Thunderheader. I have a 117ci in my FXDX. I have run the stock Thunderheader, and the Vance & Hines Pro pipe with competition baffle on the same dyno, and tuned both for max performance. Now Im going to run my Prototype pipe, hopefully this weekend. I will post all results soon!




