Which pipe would work best for MX/Dune riding? I'm currently running a TRX5 std. mount, 330cc with ESR low-mid porting. The TRX5 pipe lacks low end power and the TRX6 pipe is lacking on top end a little. Looking for something in between the 5 and 6 pipe. Is there an advantage to sticking with esr pipes to match the porting or would anyone's pipe work okay with the porting? I've mostly been considering Sparks, CT, PT, ESR, and LRD.