Jerry hall/HPR is a member here MotorGeek he has his own forum, Matt Shearer/ SCP make's/made the Q pipes and I believe he's doing his own, his member name is Pipe-Ster here. Mitch has had some new pipes made with excellent results, hopefully another batch to come. The AAEN is a copy of the old Q pipe. It is much cheaper, a lot have expierenced fitment issue's and it's not to the quality of the other pipe's. There is also the paul turner/duncan racing pipe which is good compared to trinity and also a the old LRD pipe which in it's day was an excellent pipe. The 4 new pipes are much better than the old. HPR, SCP and Mitchs pipe's are your best choices. PM them here for more info.