SilverBull

Does anyone know how much HP & Torque our IS350's can handle before the transmission goes out on them? I know this is probably a new topic with very few Turbo kits available to them.

lobuxracer

iTrader: (2)

Transmissions don't care one whit about horsepower. They are rated by torque and torque alone. I would not expect any Toyota transmission to take much more than 50% more than the torque applied by the stock engine. Transmissions have always been a weak spot for Toyota (with the one exception being the Getrag 233 in the MkIV Supra, but it's not a Toyota transmission.)