Well I just put on the Big Boy for the first time...Mixed results for me..Overall positive.

It definatley woke up the bottom even more, not that it needed it. Idled better, and I was able to lean it out a bit more bottom and top.

It seems that I lost some top over the JP-3 with a mid-range header combo.

The top never seemed to peak and almost always seemed rich, as it would slightly sputter around the top..not a lean bog sputter. It also ran quite a bit cooler even though it was leaner.

Has anyone else notice the top end sputter. Maybe I need to lean it out some more? It already is about 3/4 turn in from flush on the hsn...

Is the BB pipe known to shave a bit off the top???