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Discussion Starter · #1 · (Edited)
My dealer did a Dyno thingy that compares the stock exhaust with the Vance and Hines slip ons. I'm not a techie so it doesn't mean all that much to me except I see it gives a little more HP. I heard the difference between the two and it does sound more throatie. Difficult to describe. In the attachment the blue line is V&H.
 

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I like that the gains are all the way through the rev range. only 2 hp and 4 TQ but consistent through the whole power band is nice to see.

Now just to wait for 3rd party cat delete headers (or X pipe) that are sure to be coming soon.
 

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The phrase you're looking for is "marginal improvement". Triumph has already done a fine job of maximizing performance from the new engine by giving it plenty of displacement.
 
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