Steve that pipe looks really cool. Um, The volume is massive even for a 125, 115mm would be a likely OD at the fattest part, I'm guessing yours is 130 but that might still be ok, maybe. Might dip before coming on power.
Except even from the photos I can see the header section is about 8 inches too long!!!
I’d redo the header calculations, I can’t see it ever coming on power like that, the scavenge pulse will be waay too late with a header that long. A typical header section (before the diffuser starts) might be 200mm long not including the 45mm of port & flange.
Don't you look at my accountant.
He's the only one I've got.
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