I went to M.A.Developments in 1996 & still there. 400bhp, 500bhp 620bhp, 680bhp, 840bhp & now 900+bhp. He is the best or I would not be there. If you make the Fastest then any thing less is a doddle. You will get a 2017 Spec engine that will be best of breed. It makes no difference to me who anyone uses but have been around long enough to know who leads the field in road car engines.