I am looking into an exhaust system for my 03 400ex. I want to know which pipe and which brand of jets i should buy. Right now im thinking of buying a HMF Slip on with Dial-A-Jet. Please give me your input on what you think is the top dog for the 400ex. Thanks for your input

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03' 400ex
K&N
Tag X-5 bars
Trail Tech digital computer
Moose Shock Covers
Holeshots on rear
Front Tires turned around

 

Most of the people that i know have the pro T-4 or the HMF they all have K&N jet kits...

 

thanks trailrider500.

 

I like Pro Circuit, but anything is better than stock.

 

Anytime happy to help!!![img]i/expressions/face-icon-small-wink.gif[/img]

 

I had a FMF Powercore IV slip on for 5 years (in 98 when I bought it there were only 2 slip on's available and no performance data) with a K&N power up kit, filter, jets, outerwear etc. I thought it ran good in comparison with other 400's.
Well, I had 2 of those P.O.S. fall apart (literally) and decided to get somthing new. Happens that my dad got a new LTE Dual exhaust for his, so I took his full DMC, had the headers Jet Hot coated and bam! Only 1 other EX could hang with me! Every other I raced I got by 1-3 lengths in the hill drags so I am Incredibally happy with this setup. BTW it is also 4 years old with out any sign of failure for what it's worth.

 

so true

 

How does your dad like that LTE? I've seen pics of em'. Are they really worth the money?

 

i say curtis sparks my old 440 (ds650racers) now had a big gun but i was about to go with sparks they are nice

 

i strongly rcommend pro curcuit t-4. sounds awsome and gives tons of power!