ACTIVE AUTOWERKE BMW EXHAUST STUBBIES FOR E9X M3

You already own the Active Autowerke Signature Series X pipe for your BMW E9x M3 to achieve the maximum in performance and power, but were limited only to the race track since it replaces the BMW factory exhaust catalysts and was not intended for the highways. The Active Autowerke Stubbies is designed primarily as a cost effective means of utilizing your existing BMW Factory catalysts into something usable. If this can be done, then there is ...No need to purchase as set of catalysts to be OBD11 readiness compliant... The Active Autowerke Stubbies with your BMW catalysts will do the task of meeting OBD11 readiness requirements when installed with the Active Autowerke X-PIPE. Of course, the feature of the added performance is still maintained. You will find that the front section of the Active Signature X pipe is totally removable by the use of V-Band clamps. Simply remove this front section and replace with the BMW primary catalysts that are converted with the Active Stubbi