For those of you that think true duals and mufflers lose in HP and TQ, here is my dyno. I am running a Ness Big Sucker, PC III USB, VH Bagger duals and Oval Slip-ons, and a 37G on a TC 88 with stock heads. 82HP and 90 TQ is not too bad. Take the little blip at 3900 RPM and you are looking at about 88 or 89 tq. I am happy with the build and doubt I will do anything more. Those of you convinced the 37G needs compression, I say you are wrong.