heres a new one

[idontknowwhoiam]

as far as slip-ons i dont care about bein "loud". what will give me the most power gains in the woods with a pretty much stock 400ex. i have a yoshi. rs-3 on my 750 and dont like it, everyone says yoshi,yoshi, yoshi. but i think im leanin twards a e-series...help me out

[gojufist]

check out a hmf, i love mine

[ohsobad_chevy]

I got the HMF sport series, Love It!!! Nice pull throughout the RPM range, and oh yeah....not to mention the sound is @#$#'in RAD!!!!:devil:

[idontknowwhoiam]

yea i been lookin at them too..but iv never actualy seen or heard one b4

[cals400ex]

you will see nice gains from a full system over a slip on, especially if you do a few more mods to the bike. i would get the full HMF if it was me. i might consider a few others if you were going heavily modified.

[firefighterjosh]

HMF all the way!:D

[yfzfelix]

the e-series is an awsome pipe on a stock ex, don't forget a K&N filter to go with it, then go to the Alba web site and buy the White Bros rev box, those three things together will wake it up, thats what was on mine when it was stock and its a good combo

[firefighterjosh]

I wouldn't go K&N. I would go with a Foam filter. Like Uni, or No Toil.

[400exrider0004]

i would definately go with the e-series. I believe its the best pipe you could go with for the 400ex, but thats my opinion. Make sure its jetted right and get a filter, and youll be impressed.

[mic 902]

U shud get a CT racing exhaust i got 1 and it is sweet.

[jhr400EX]

I have been extremely happy with my Big Gun full system. Sounds great and gave a nice increase in power.

[400exrules]

hmf or sparks are both great choices......the best pipes made IMO for a 400ex

dont get the WB e-series....ive heard hundreds of stories of them cracking, they are poorly made

[idontknowwhoiam]

Wult.....i think im gunna order a hmf..i just sold my gixer today so i got the money to do it..thanks guys