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duke 390 modified stock muffler ?

49K views 45 replies 22 participants last post by  390DukeBraaap1  
Buddy of mine had Dual Supertrapp's on his 1985 V-Max and a Dynojet Stage 3 carb kit done at local Dynojet facility here and when they had it on the dyno his neighbors started coming over to see what the H**L he was tuning ! I rode it and next to my K1300s it was the fastest bike I've ever ridden. Was definitely the loudest by far !