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Discussion Starter · #1 ·
I have just bought a trx400 and i'm looking for ideas for a pipe and filter
I ride mostly trails and some dune probably 75% trails and 25% dunes.
Reliability is high on my priority list also it needs to be forestry approved.
the supertrapp has removable disc to change the db's does any body use this
pipe
 

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383 Posts
hmf they have different tips to change dbs.hmfracing.com
 

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HMF, FMF, Curtis Sparks, Yoshimura sounds real nice on a 400EX too ...... UNI, or K&N with outerwears
 

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Agree.Curtis sparks and hmf makes a real good 400ex pipe.
 

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I use to run a Supertrapp on a dirt bike. Great pipe and great quality. HMF has different tips for different sound levels.
 
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