What we need is something very light, projecting forward no more than 75mm, downword no more than 30mm. with small undertray, backword no further than inner edge of rad, all bolted to underside of bumper with couple of light stays, easy to replace as its likely to be damaged quite often on my car at least. I have a spare bumper off my new build free to use for a few months if of any help. cheers den.