Simple.

All FMIC will be laggy as they have more pipework that needs to be 'charged'. You can minimise the lag, but at great expense. For a TD04, FMIC is wank. Even a VF34 on a mild to heavy tune doesn't need it.

Ebay coolers are cheap ass shite bar and plate. You may as well stick a heat sink on your engine as all it will do is heat up and make your intake temps shocking causing shite performance.

STi cooler is tube and fin so a much, much, much better design for heat exhange. If you can get the Spec C unit which is better again (has the dimpled top tank). MY99 won't require much modification to install the STi TMIC and you should be able to fit a strut brace easily. I have a Cusco strut brace with STi TMIC on my MY98.

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[COLOR="Gray"]550Nm off a 2L... Just wish it was in the dak dak...[/COLOR]