Max boost on the stock CT26 seems to be 15-16psi. They can go higher, but they don't hold higher boost very well so it's like pissing into the wind really. The Supra CT26's are meant to be slightly better, and the aus spec GT4 ones are better than JDM ones as they are steel wheeled.
You could get it highflowed and get a T04 wheel put in, that's what I'm running right now and it pulls a fair bit harder, a little laggier though. Better still is the CT20b, if you can find one for a reasonable price.
Reasonably priced upgrade, I'd look at the Greddy TD06 kit. When I can find enough money, I'll be getting either that, or the ATS TD06 kit. www.atsracing.net
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