9 months old, So its a Bisi v1?? What size collector is on it??

BTW, dyno comps should be done all on the same day were all condition can be equal. Plenty of test have been done with custom headers and I promise out Bisi didn't come out on top, it has one of the worst power/tq curve. I have a custom DTR for 2.0, a custom smsp, a hytech big tube, and a Bisi fakie with 3" collector so I'd def be down for some more testing.

By no means am I hating or bashing, its a decent header but talked up way more than it should've been. GLWS