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how much did you gain from doing the head work and the 904 kit? did you ever have it on a dyno before or after in your opnion is it worth it?
Here is what I had with 790, Sceptre Pipes, Nology coils and wires, airbox removed with K&N filters. Notice the spike in torque that caused it to probably incorrectly read 47.39 ftlbs, I think the 44 would be more accurate.
And here it was after the 904 with port/polish and +1mm oversize intake and exhaust valves
A gain of around 16rwhp and almost 10ftlbs of torque.
It still required fine tuning after this run, and I've done more since then to get it even more power and dialed in.
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