ARROW 71718MI Collector :- Stainless steel 4:2:1 Non-Cat BMW S 1000R & S 1000RR

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Fits: 2019 > UP Fits: 2021 > UP In the diagrams above, a Broken Line indicates that both items will connect together or will connect with the O.E. corresponding item at time of ini tial fitment. Arrow Part Number - 71718MI Note This ARROW Racing 4:2:1 Collector unit is designed to be used with any of the ARROW Slip-on Silencers [Race-Tech / Pro-Race / GP2] designed for this model.Or alternatively, the O.E. silencer can be retained. Made from INOX Stainless Steel [AISI 304 grade] for a durable light weight item that allows performance gains. This Racing collector system is supplied with provision for the O.E. exhaust sensor mounting points (2). > Technical Note :The BMW Original Equipment Collectors unit has a fixed exhaust valve attached.When replacing this O.E. Collector unit with the Arrow Racing Collector #71718MI, the exhaust valve will be eliminated. The BMW On-Board Diagnostic System (EOBD) will display a warning message due to the exhaust valve malfunction [removal]and the ECU can / will enter a 'Recovery Mode' status. Therefore, when installing the Arrow Collector, it is strongly recommended to remap the ECU witha 'Deactivating Exhaust Valve function' map. Or alternatively, purchase and install an After Market 'Exhaust Valve Emulator System'. Specifications for Link Pipe - 71718MI Features Details Headers material Stainless steel Headers mounting Welded bracket Junction (outlet) diameter (mm) 60 Sensor plug provision Yes x 2 Weight (Kg) 3.14 Show more