If you want any performance gains go at the very least 2.25" or its a waste of money... 2.5" seems in many cases the sweet spot for performance ability to go further as more performance parts, tuning becomes available. You may quickly hit a ceiling with 2.25"!
Hatch Nation #156. Sonic's Mk3 Crew Founder and #00
Moderator: DURATEC Ti-VCT Performance, ST Performance, MK3 Focus, SW Fanatics, Sonic's MK3 Crew