the housings on GT2835's are not bigger than the T3 housings on a JWT Sport 650. The problem is that you have to bolt them to the stock manifolds *ack!*. Im sure if Gyro got the garrett cartriges he could build a set of GT2835's... using a T3 housing on the compressor side and either a T2 or a T3 housing on the exhaust side, depending on how much power vs. lag ratio you want.