I'm going to get a slip-on exhaust. My question is which would be better the WB E-series or the FMF Powercore. In the future I plan to get the stock header Jet Hot coated. The WB claims an aversge of 4-7 HP increase, but is also $40 more. I've had FMF pipes before and thought the fit and finish was good. Any info would be very helpful. Need to order soon! Thanks

 

How about trying Peter Van Loenhout's Custom-X muffler, fit and finish is first rate. Torque increases massively across the rev range. You will probably want to gear up afterwards.

With the price of our Aussie Dollar - it will be WAY CHEAP for you guys in the USA.

It is reviewed on the bombardierds650.com website, just bear in mind to get any upper-end increase you will need to re-jet and go to a K&N filter.

 

I see in a dyno test that the FMF got the lowest all around rating. Big Gun was best for complete systems and White Brothers was the best for a slip-on.

 

Thanks so far! I thought the Custom X was a full system. So far it sounds like the WB is the best bet. Keep it coming. I'm prob. going to order tomorrow.