10-03-2013, 03:50 AM
(09-03-2013, 08:29 PM)Midnightclub Wrote: Petrol back box will be worse than the standard back box
Not at all I have fitted my magnex car back off my old 6 to my derv and it now boosts 20psi instead of the 18psi so defo not true. Standard system mayb but aftermarket this is defo not the case