Quick question, I want to buy an 01' IS300 but is it possible and how costly would it be to convert the auto transmision into the standard 5spd?

 

Yes, you can do it, but why would you want stock 5spd manual? Are you planning on boosting soon, and expecting to make 500+rwhp? If so, why not R154 or V160?? If not, it is my honest opinion saying that it is not worth the money nor time.

Our auto hold pretty good amount of hp with some modifications anyways...