[justinwilliamskx]

im trying to decide between the hmf utility series and the supertrapp idsx both are around the same price they claim on ebay that the hmf adds 7 hores power is this true or just crap thanks

 

[Robb]

i had them both on my 450, noticed an increase when I went from supertrapp to hmf. My vote: HMF

 

[MAD MUDDER]

i also vote hmf, i had two supertrapps and they were nice pipes but the welds broke on my first one and the disks would clog up with mud.
-Aaron