what gets me is the always open transfers. I'm just trying to learn about port timing, and this throws a monkey wrench into the works. really clean casting tho mine's not scruffy at all! the split exhaust seems small and needs widened. I'll probably leave the transfers alone. so much simpler. oh and it came on 6mm studs but fits 8. other than the intake being square and small exhaust, I bet it outflows a lot of stock jugs. once the transfers r open, they open more n more until max at BDC.
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I got mine from BGF on a complete motor he lists as 2019. I'll start a thread on it bcs there's some weird stuff abt this engine lol