I am wondering what pipe u would say is the best for the 400 ex, I am also going 2 put a k&n on it with outerwear if that makes any difference. Also is it worth the money to get a full system not just a slip on.

 

The best in my opinion is a WB E-Series slip-on!

 

Both of our E-series pipes are broke. I had to weld one back together,already. I wouldn't give them to anyone, thats how bad they are.

The curtis sparks x-6 is the most power gain of pipes for the 400ex.

 

Ditto. My E-Series cracked too.



If you don't mind loud, I think the Supertrapp is the biggest bang for the buck. Assuming you want economy since you don't want the head pipe too.

 

I have a Pro Circuit T4 slip-on and I think its works just fine. Love the way it sounds!
Unless your motor is bored oversize or you have a high reving cam with a higher compression piston, I would stick with the stock headpipe. Its better for low end torque anyway which the 400EX motor works best at, IMO.

 

I'm very happy with the HMF [img]i/expressions/face-icon-small-smile.gif[/img]

 

jw, how much louder are all these in relation to each other???

 

i run an e series on my 400ex and a trinity on the z400 there both real nice pipes as far as the e series breaking i havnt had my ex long enough to find out the e series was already on it. the trinity is awsome but a little loud. a buddy of mine runs a t-4 on his raptor and its got a real good sound and not to loud at all. the big guns are real loud also

but man hey theres a lot of good pipes out there i think you would probably be happy with any aftermarket pipe as long as you rejet and probably a filter which you said you was gonna do.(WHATEVER YOU BUY DO NOT BUY A DG I HAD ONE ON MY 300EX PIECE OF CRAP UNBELEIVELY LOUD NOT MUCH HP GAIN UGLY THE ONLY PLUS IS THAT IS VERY CHEAP

 

HMF Yoshimura or Sparks Hands down but the CT pipe is very good also

 

big gun race full system,k&n filter outerwear and a ehs airbox lid ,and of course re jet thats what i got coming for mine its on its why from your country .......