If you have a gtir manifold you can use a t28, but if you are not used to driving a turbo car take it from me the t25 is lots of fun, but will eventually it will leave you wanting more boost like always. but that little turbo will surprise those stock or lightly modded sti/evo's as long as they don't hear that turbo spooling, butmy HKS exhaust doesa good job of hiding it.