Picked up a 5MT tranny from a 2004 Impreza last year. Low mileage and someone had already done the AWD to 2WD conversion to it. Was going to use it in a beetle. (dune buggy)

I wrote a thread about it during that time, but someone replied that the 5MT couldn't take big numbers. I'm looking to couple a STi engine with it and hope to get around 250 HP. Is this too much for this tranny?