Check us out @ www.hotseatperformance.com we offer pipe that works very well and it adjustable for more so you can change the powerband of the pipe by addinor removing shims to the head pipe. Which ever pipe you decide to go with you need to get a clutch kit to match this is very important, if the machine is not clutched properly you will nit run @ the proper rpm were the new pipes makes its power and when that happens your quad is slower than it was in stk. form. Our pipe kit come swith proper insallation instructions and jets too. We also carry a speed kit that comes with the pipe kit, proper clutch kit, and a k&n filter. Check us out and let me knwo if you have any ?'s

 

if you want more top end go with the AAEN but if you want more low end like i got get the hpd with the mt muffler with a nice 100 decibal sound

 

From all the pipes I have run on a 400 I like the Dynoport for over all performance.And the HSP for all out perfomance.The Dyno will work best for 4x4 riding and tight trails.
Belive me I have tried most of the pipes and these to do best for me.

 

DG sounds good and its at just the right sound level as much as the gains im not sure of.

 

I put the HotSeat Complete kit on my 98 Scrambler about a year ago.......... WOW !

I run with 250r and 350 Yam's... now ! no problem, in the mud..... See Ya !

 

whatever you get DO NOT and I repeat DO NOT get DG. DG is crap for Polaris 2 strokes. FMF is just 1 step above DG.

 

i second that. FMF sucks for 2 stroke fourwheelers and DG sucks even worse. i dont know much about dynoport but for low range go with HPD or RCR and for top end go with AAEN. good luck with your choice

 

id say go with AAEN or RCR

 

This is what I had heard but I ended up buying one accidentally for a good price and it sure increased power by quite a lot, it is a lot faster and sounds decent, only complaint is that it didnt fit quite right and rattles a little bit. Working on fixing that though.

 

go with a hpd trail pipe ritter does sell hpd and his own pipes but even he will reccomend the hpd for most applications.