Returned the FPR. BMW ofc used a nearly-proprietary size on the FPR. Even the Bosch part has the last 7 digits of the BMW part number stamped on it. Not sure what to do now. New injectors aren't exactly cost effective and would most likely bump in a lot more fuel than +.5bar FPR. It only leans at weird spots, too. Cruising or right at gear changes and only with very light throttle. Light-medium to heavy load and the car runs perfectly fine. But when it leans I can feel a slight vibration, though there are zero codes other than adaptation limit reached. Maybe it's time to try and modify the stock FPR manually.
ETA: Or I'll cave and get the M3 FPR then hope for the best. Or get the Dinan modified E36 M3 FPR. THey both fit the E39 filter.
Last edited by deadwood83; 10-10-2012 at 08:09 PM.