Wouldn't getting a good full exhaust and then rejetted help increase power? I've seen some dynos really impress me with a significant bwp increase, however I've seen other dynos that wouldn't seem that it would be a good investment to ever get a full exhaust system.
I understand the whole powerband debate here. If you have a 600 engine your powerband is going to stay the same for the most part no matter what you do.
I understand the whole powerband debate here. If you have a 600 engine your powerband is going to stay the same for the most part no matter what you do.