[ixxblitzxxi]

I have a 2012 1000 renegade with a two brothers exhaust, it seems to lose performance with the exhaust installed, I've only rode with it installed for a couple of rides, but my old g1 didn't need a tuner when I had my exhaust and it ran beautiful, but I imagine being a dual exhaust, it flows easier and more efficient, two brothers claims there's a gain of hp but yet there are no maps for a tuner for the exhaust? Any suggestions, is it worth $200 to get a tuner? There is no excessive heating with the exhaust on, doesn't backfire unusually, just isn't as snappy, top end isn't as great either

 

[crazed]

Honestly, you'll never know for sure with a "butt dyno". The gains are too small to notice without putting on a real dyno.

That being said, a pc5 or dobeck gen 4 will tell you where your air/fuel ratio is and that information will tell you if your losing power or not.