I know im stating the obvious, but the first one is fitted to the librands manifold and the other to the aero manifold.I understand that the 400 cat is more restrictive than the 200 and will pass the MOT easier especially when older,but is the 400 too restrictive that you would notice the power drop with normal driving and is this why the factory will only give a clubsport flash to an ECU fitted with an aero manifold ,whilst the new enhancemet flash is only for the ECU with a librands manifold,any one have any ideas,duncan
