So, i have a 98 S70 T5 manual. its lowered on ipds and bilstein struts. cold air with down pipe and exhaust... my next plan is to do an ECU and an inter cooler and Reverse inter cooler piping kit. im planning on doing it in steps.. which should i do first or be more effective? i know the ECU would help big time but im gonna do that after i do the inter cooler or reverse inter cooler piping kit. so which one is more effective, just an aftermarket inter cooler or a reverse inter cooler piping kit?