Switching from the e-series to the r-series anyone know witch one works better?

 

Nobody? Guess I'll put it on & report back.

 

I doubt that you'll notice much of a difference other than the additional noise.

 

I do not remember the issues but, if you look back over the past year of Dirt Wheels, you will find pipe shoot out for the Raptor and the 400ex, that give descriptions of the pipes, you will also find a review of the E-Series.

 

according to dirtwheels, the e series outperformed the R series

E series=32.1 HP @ 4k rpm and a peak HP of 44.9
R series=29 HP @ 4k rpm and a peak of 44.1