TRX5 vs TRX6 vs TRX9 on a 350

[Burns310r]

Anybody every experianced either of these pipes on a BB engine?

Im looking to get rid of my LRD BB adjustable pipe for either a TRX 5 or TRX 6 pipe or TRX 9 Im not sure which one to get though.

Im running MX with the bike, and im looking for more even power band.

Let me know your opinions of these pipes.

[C-LEIGH RACING]

Daughters 250R, has 350 jug racing TT & I use the TRX5 for long open tracks & then a CT midrange for short tight tracks where more bottom end is needed.

Cylinder is ported just a little above midrange & only 180lbs compression.
I use a shortened CT silencer on either pipe, will fit either, with the packing packed real tight so I can hear it just a little over the obnoxious 4 pokers.
Neil