I am going to add a K&N Power Kit, modify my air box, and add a full exhaust system to jmy 400ex, I want ether a CUrtis Sparks pipe or an LRD pipe. COuld some one who has one of these pipes tell me how it worked out for them?

 

I know where there is a complete Pro Circiut T-4 exhaust. Call Craycraft he will give you a good deal on that one or a complete MBRP exhaust for your 400EX.

 

Just drop a 11 to 1 piston in for aroun $120.00 and make more horse power than a pipe and K&N could ever give.

 

I like white brohers my self. got to exriders.com and go to product test they do a bunch of test for pipes and stuff.

 

I like my Pro Circuit and i've heard good thing about e-series. My friend has a MBRP on hid ds and it's nice but i don't know what i'd would sound like on an ex.

 

sparks pipe really nice u get it in the package and u open it up so shinny and nice u could pop pimples fit is really nice proformers great but sparks got to pipes availble for the 400 x-4 or the x-6