Id personally go with this onehttp://store.yahoo.com/cheapturbo/gart3to448ar.html If you insist on going that big. But i still think you would be happier with the super 60

 

I would not go with the t3/t4. I have a Garret t3/t4 57 trim on my GSR engine and it doesn't reach full boost until past 4500 RPM so I can't recommend it for the milder b18a. The t3 super 60 is a better choice. I'm hoping to get a "disco potato" in order to hit boost sooner but the price is crazy. T3/t4's are a bit too laggy in my opinion.