I currently have an 07 R53 with a 16% reduction pulley and colder plugs and CAI at 70K that I love driving. Recently I realized I'd like the supercharger to spin a little more at lower rpms. My driving style is all under 4.5-5 K and I never ever red line the thing. Would I be better off with a new 19% pulley or a 2% crank added to my current 16% I have a credit at way motor works I need to use... and would it make a difference noticeably?