I'm not a fan of the Injen
I like the AEM
myself. my buddy has a K&N, it's a pretty decent Short Ram
, gives him some more go and stuff. I haven't seen any dyno numbers on it, so I don't have much to say. Personally I'd go for AEM
but since you have a GT there's less reason to speed through low end (get to lift), the GT suffers mostly at high end so for your application I'd say Injen
would be pretty good. I don't know if K&N makes a system for the celica, but I do know they make a pretty quality product.