Yo, my brother is looking at getting Looney Tuned Duals for his 400ex. Is this a good move?

 

IMO he should go with a full single exhaust. I think the duals look cool but I don't think they will give you any gains on power over a single on a 400ex. If it is for looks go for it!

 

I would compare dyno tests because I do know that some single pipes put out more gains than duals as many are not "true" duals. However, if you are just looking for appearance and sound, then it really wouldn't matter.

 

on a small bore they make no diff. my rappy has 2 pipes out the motor and thats why i use them. the best other than the lte's is the yousie tit.