55lbs are a better injector, better flow, but i,m sure 400s will be fine, greens max out around 350ish from memory, although some say not, always different opinions...
My old 3dr on a T34.48 was live mapped on Greys, made 363bhp with similar torque, best road conversion around imo, just SO punchy...
Give James, or Stu a PM and i,m sure they,ll help you out....
