Will I regret saving $150 buying the aftermarket brand DISA valve replacement over the Genuine BMW DISA valve? Is this something I should spend the extra money on and not have to worry about any more, or are the aftermarket versions of this just as good as Genuine BMW?

Hey guys, just wondering if you would ever bash someone who added multiple CSL parts to an M3, creating an almost complete CSL makeover (including the CSL badge) for not having a "real" CSL? I know I know be yourself, it's your car you can do what you want. I just wanted to know the opinion of...