{"product_id":"arrow-pro-race-titanium-slip-silencer-bmw-m1000rr-k66-71903pr","title":"Arrow Pro-Race Titanium Slip-On Silencer BMW M1000RR K66 (2021-2026) 71903PR","description":"\u003cp\u003eRoad-legal and race-ready in equal measure, the Arrow Pro-Race Titanium slip-on silencer for the BMW M1000RR K66 carries a full E-number type approval so it passes scrutineering on the street without compromise. At just 1.22 kg — achieved through an all-titanium construction from inlet to end cap — it shaves meaningful unsprung and overall mass from the tail of one of BMW's most focused superbikes, sharpening throttle response and reducing rotational inertia where it matters most.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eE-number road approval and integrated DB-killer for legal street use, removable when regulations permit for a freer exhaust note on track.\u003c\/li\u003e\n\u003cli\u003eFull titanium construction throughout — body, end cap, inner components — combining exceptional corrosion resistance with minimal weight for long-term durability.\u003c\/li\u003e\n\u003cli\u003e1.22 kg total weight delivers a tangible reduction over the stock unit, contributing to improved throttle response and a more dynamic ride feel.\u003c\/li\u003e\n\u003cli\u003e60 mm inlet and 68 mm outlet diameters optimise exhaust flow for the M1000RR's high-revving inline-four.\u003c\/li\u003e\n\u003cli\u003e250 mm silencer length, precision-engineered for the K66 chassis geometry — no modification required for a clean, factory-quality fitment.\u003c\/li\u003e\n\u003cli\u003eDirectly compatible with Arrow headers to form a complete Arrow exhaust system, unlocking further performance gains when combined with a dedicated ECU remap.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eBuild Quality and Performance\u003c\/h2\u003e\u003cp\u003eArrow's Pro-Race line sits at the top of the Italian manufacturer's road and track hierarchy. Every component of the 71903PR is fabricated in titanium — a material chosen not merely for its weight advantage but for its ability to withstand the extreme thermal cycling that the M1000RR's engine generates at race pace. The result is a silencer that resists discolouration, corrosion and fatigue far beyond what stainless steel or aluminium alternatives can offer over a sustained period of hard use.\u003c\/p\u003e\u003cp\u003eThe integrated DB-killer is engineered to keep sound levels within legal limits without introducing a restrictive baffle that would blunt mid-range delivery. Riders who upgrade to an Arrow header simultaneously and commission a bespoke ECU remap will find the full system transforms the M1000RR's power curve, with improved fuelling and a broader, more linear torque spread.\u003c\/p\u003e\u003ch2\u003eImage Note\u003c\/h2\u003e\u003cp\u003eProduct photography currently shows a BMW S1000RR, as Arrow has not yet released dedicated imagery for the M1000RR. The silencer shown is geometrically and aesthetically identical to part number 71903PR; fitment and specification for the BMW M1000RR K66 (2021-2026) are exactly as described.\u003c\/p\u003e\u003ch2\u003eFitment and Compatibility\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBMW M1000RR — chassis code K66, model years 2021, 2022, 2023, 2024, 2025, 2026\u003c\/li\u003e\n\u003cli\u003eCompatible with Arrow headers for full-system configuration\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eAttribute\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart number\u003c\/td\u003e\n\u003ctd\u003e71903PR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.22 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eTitanium (body, end cap, inner components)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSilencer length\u003c\/td\u003e\n\u003ctd\u003e250 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInlet diameter\u003c\/td\u003e\n\u003ctd\u003e60 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutlet diameter\u003c\/td\u003e\n\u003ctd\u003e68 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoad approval\u003c\/td\u003e\n\u003ctd\u003eE-number approved, DB-killer included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eBMW M1000RR K66 (2021-2026)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"Arrow","offers":[{"title":"Default Title","offer_id":53168793321738,"sku":"71903PR","price":610.47,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/71903PR_1f4220e7-bdd6-48e7-8d8a-341644cc2ee4.png?v=1780815449","url":"https:\/\/inter-pace.com\/products\/arrow-pro-race-titanium-slip-silencer-bmw-m1000rr-k66-71903pr","provider":"Inter-Pace","version":"1.0","type":"link"}