Go back to a TMIC, add the PFC (and a TD-06 if you want) although a VF series turbo would be better, take it Sean for tuning.

For handling upgrade to lower stiffer springs, adjustable sway bars, add strut braces and an ALK.

What brakes is it running?
Decent grippy tyres?
What other mods is it already sporting? zorst? CAI? fuel pump?

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