Originally Posted by wrxwhit
Our 5th gens have no trans failures as far as I know at stage 1 or 2. Doing a custom turbo swap as some have done would definitely test it's limits with the amt of torque producing close to 400 tq to the wheels. Just for reference, I had a WRX with close to 400 whp and had 1-4 4th gen lgt gears which I am sure are similar in strength to ours and destroyed 3rd gear getting onto the highway. Anything is possible once you start increasing power.
Thanks, ...that is good news. And yes I agree that anything is possible once you increase power/torque but seems like the trans will hold up safely up to stage 2.