the stock wrx 5 spd tranny cant take 400hp.

what can a lancer tranny take?

 

dont think anyone has found out yet.

If you are talking 5 speed i think boe right now has the most power going into his so i would talk to him (boeturbolancer)

 

From what I've heard, Mitsubishi transmissions are "bullet proof", and the Lancer tranny is built similarly to the Evo, so it should be able to take the same power. But this is just word of mouth by Subaru owners, so take it as you will.