Seems like pretty good info. I have the TTR 2035 long pipe also. I want to try the 2039. Got one coming. I had a Nova 86 pipe. That thing pulled so hard on my P5X, it would literally run down cars ahead of mine of the straight. Need to get a another one, mine got totally destroyed. I think the 2035 is holding back my Axe Rossi Cobra. I strapping a 086 pipe on it tonight to see how it runs. For the price though, they are good for a 3 port or sport motor.