Originally Posted by 
zilch
				 
			from all of the reports i have seen, the D300 will have similar if not the same large rotors and calipers as the P400. One of the few 18" that has been fitted to a P400 was
after some modifications to the rear brakes (sdv6 D5 calipers retro fitted) and they were Tuff Ant alloys.. that was done by Lucky8 in the good ole US of A.. 
fettling with the brakes is a risk to far for me personally, especially around insurance and vehicle compliance.. so will stick with the 255/65 R19 fitment [bigsad]