I am buying for sure some kind of silencer. I am not buying a full exaust. What silencer will give me the most horsepower gains throw the hole powerband. Right now i am leaning towards the e-series.What should i buy?????

 

Your on the right track. The E-series adds the most power.

 

I have a brand new Stock OEM 400 EX steering stem still in the box $55.00 shipped to the lower 48 states, I also have a Brand new Pro circuit T-4 slip on exhaust for a 400 ex still in package $150.00 shipped to the lower 48 states,This is made by White Bros, they are the same pipe please email if you have any questions. All items are in new condition price’s include shipping.

Thanks,
Steve

 

Just to let you guys know and i'm not trying to be a jerk saying this but the e-seris doesn't put out the most horse power. The Curtis Sparks pipe puts out the most usable HP. So i would look into that pipe before buying anything.