I just bought this bike a month ago and it does have a wicked trail port, just right below is dune port. Your right I did notice the the bottom end bogging..i did adj the air screws and seemed to help with 2.5 turns out compared to they were bottom out..it acutally pulls hard..but then again never had a ported banshee..I can say this, last weekend I raced alot of 450's w/exhaust, intake, programmer on a 260ft sand drag set up here at the local track. almost everytime they took me off the line, pulled them in around half track and won 1-2 bikes length. their was one 450 rider that weighed 125 lbs that actually beat me one time but I was pulling on him after a bad start..i weigh 250 by the way...I guess I just wanted to try a different pipe with my setup what it boils down to..