I'd be curious about a throttle body. Only other one I think is out there is Impul's which is like 3200 if you don't send your own. I've been looking into doing an NA build myself and a throttle body upgrade is definitely up there. FWIW megan370z took out the throttle bodies and bored them out himself. Could give him a shout because that's really what these aftermarket ones offer and if you can do it yourself you'd save some serious money.
Another thing to consider maybe the okada Coilpacks? I've seen them as low as 1167 shipped.
I forget, did you do a lightweight flywheel too?
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