Knock Knock



Since MB just used exactly the same technique on the M139 to get over 400HP that MZR DISI tuners have been doing for a decade (albeit with perfect packaging)
I wonder which of the aftermarket tunes for the M133, that are pushing the envelope, have been found generally safest, running into fewer issues with KR ect.
THANKS
the "technique" is adding a port injection manifold, on top of the normal direct injection


