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duke 390 modified stock muffler ?

49K views 45 replies 22 participants last post by  390DukeBraaap1  
One drawback of any aftermarket company making a compact underbody similar to OEM is the short header length and its detrimental effects on power. I fully understand not wanting a can hanging off the side, but we're making over 40% more power in the midrange with the MIVV, so that's a trade off I'll gladly accept. It's just too fun.....