Where can I get some Dyno sheets for this pipe and is it better than the white bros, e pipe should i get the whole pipe or just the slip on.Could you really tell any thing by the dyno jet kit When i bought my 400ex it had a 155 main and yosh pipe dynojet kit pipe looked good but the bike felt like Sh_ _ I put it back all stock and it ran whole lot better any suggestions i sold the yosh pipe and the jet kit.From my experiences some bikes gain alot from a jet kit others it hurts them the dyno will show that.

 

I would also like to know about the DMC. I am possibley getting one. anyone have a general idea on the power gain? my guess is 6hp give or take about 2

 

Go to the GT Thunder website. They do a pipe shootout with the 400EX and they dyno every pipe. The DMC and White Bros are the top picks.

www.geocities.com/~gtthunder/testbed_set.html