I basically put straight pipes on my 05 TBA and I haven't noticed a difference in low end torque at all. I really like the sound I just don't pin it when the heat is near. I've been told that it's tame compared to most of the harley's around here but if I rev it in the paking lot at work it sort of sounds like a NASCAR or dragster...

Just my 2 cents...

1982 Pontiac Trans Am...K.I.T.T. in progress. "It looks like Darth Vaders bathroom in here..."