hey Glen your downpipe looks huge are they 3.5"?
I am having issue with my downpipe clearance Im trying to fit a 3.5" one but cant find any space.
do you have a vertical shot of your downpipe?
what diff will you be using?

with 2jz and gt35r you should be able to hit 350rwkw without dramas with the right supporting mods and tune.
what ecu are you using?