Just been out in my friends 419.bhp at the wheels rx7 and it was so much quicker than my s15,i would like to no how much internal work id need to get that kind of power?will the gear box hold up to this?Im going to pop down to PPI who looks after my car and c what he can do for me, im going to take the car of the road over winter and nxt year and get some proper power out of itIts adictive the feel of 400bhp Id like to say 5-6k would do it but unlikly i guess?