I got this sent from alyn via email so it might help you
like most things depends on your target and future goals??
road car wise then the 2.5 takes a lot of beating because of the torque it produces even in near std form and a 2.1 will only ever get anywhere near with a twin scroll kit and even then will still feel lacking......
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Maintained by Hypertech and Mapped by Andy Forrest
1998 UK Turbo , 1998 Terzo , 1997 JDM Type R the money pit , 2004 black WRX STI Type UK , 2004 blue FSTI
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