Changing my pipe will be a last resort. My pipe is a high perf pipe and designed for on road use. I'm still not convinced my pipe is causing my power woes. This is the second one I've tried with a totally different tuning length and it runs about identical to the other pipe. Thinking I got a lemon. No lie, mine has about 60% of the power as the rest of the field.
BTW, my engine model is the SP12TRPT, is this one junk? Also, once I got the head off I realized it has an aluminum sleeve (AAC). Anyone else having trouble?