I have freinds with ex's one has a WB they other has a yoshi both slip ons, the WB has alot of bottom end but i think i like the yoshi better it sounds sweet and has alot of top end

 

jmoney is right it is loud. if you run it with the stock air filter they promise hp gain without a rejet. I went with a uni filter and outerwear a 155 main and a 40 pilot. I was still getting let off back fire so I adjusted the needle clip on notch richer and not only did it get rid of the backfire but I got more power in the main part of the throttle.





PS Hey jmoney we did this on wednesday it was pretty wild but I pulled it off. I would like to know why some of the screws on/in the carb don't want to budge and others come out no problem.

 

any db ratings?

 

Don't know about the DB's but it's pretty loud. The pipe shootout has a listing of noise if you can find the article.

PS I've bottomed out the rear end and not left so much as a tire mark, scratch or ding on my e-series.

 

if i were you id go with either the T-4 or the BigGun

 

i dont know what kind of gains it has, but my friend has a 400ex with an fmf slip on and i love the way it sounds, i've been asking around for a pipe that will give me the same sound on my raptor.