{"product_id":"arrow-71860akn","title":"Arrow Slip-On Thunder Aluminium Dark – KTM RC 390 (2017-2020) 71860AKN","description":"\u003cp\u003eEngineered with track performance in mind, the Arrow Thunder slip-on silencer in Aluminium Dark delivers a meaningful weight saving and sharper throttle response on the KTM RC 390 — exactly what riders demand when every tenth counts. At just 2.03 kg, the anodised dark aluminium canister replaces the heavy stock unit and lets the RC 390's single-cylinder engine breathe and rev with greater urgency, whether you are chasing lap times or carving road passes.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eWeighs only 2.03 kg — reduces unsprung and overall mass for noticeably faster throttle response and more agile handling\u003c\/li\u003e\n\u003cli\u003eAluminium Dark canister with carbon end cap — race-derived materials combine durability with aggressive, purposeful aesthetics\u003c\/li\u003e\n\u003cli\u003eStainless steel internals — resist heat cycling and corrosion for consistent, long-lasting performance season after season\u003c\/li\u003e\n\u003cli\u003eE-number road approval — fully street-legal with the removable dB killer included for noise compliance without compromising character\u003c\/li\u003e\n\u003cli\u003edB killer included — maintain legal sound levels on the road; remove it at the track for the full Arrow soundtrack\u003c\/li\u003e\n\u003cli\u003eExpandable to a full system — pair with an Arrow header for a complete performance exhaust installation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eBuild Quality \u0026amp; Performance\u003c\/h2\u003e\u003cp\u003eThe Thunder canister's Aluminium Dark finish is not merely cosmetic — the treated aluminium alloy shell keeps weight to an absolute minimum while handling the sustained heat loads of hard track sessions. Internal components are fabricated from stainless steel, ensuring the silencer maintains its flow characteristics and structural integrity long after lesser units have degraded. The carbon end cap adds a final race-shop detail that looks at home on the circuit paddock or under scrutineering lights.\u003c\/p\u003e\u003cp\u003eThe 270 mm canister length has been optimised for the RC 390's exhaust pulse characteristics, promoting mid-range torque and top-end pull without requiring any ECU remapping for a noticeable on-road improvement. The 54 mm inlet and 50 mm outlet diameters are sized to maintain exhaust velocity at the engine speeds this bike uses most.\u003c\/p\u003e\u003ch2\u003eInstallation Note\u003c\/h2\u003e\u003cp\u003eFitting the 71860AKN requires the Arrow connecting pipe 71667MI, sold separately. Once the connecting pipe is in place, installation is straightforward and uses the standard mounting points. To build a complete Arrow exhaust system, the slip-on can be combined with an Arrow header\/collector pipe for the RC 390.\u003c\/p\u003e\u003cp\u003ePlease note: the product image shown may have been digitally composed as a fitment reference, since Arrow had not yet released an official photography shot for this specific application at the time of listing. The silencer itself fully corresponds to the specifications described here and is confirmed for the KTM RC 390 2017-2020.\u003c\/p\u003e\u003ch2\u003eFitment \u0026amp; Compatibility\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eKTM RC 390 — model years 2017, 2018, 2019, 2020\u003c\/li\u003e\n\u003cli\u003eRequires connecting pipe Arrow 71667MI (sold separately)\u003c\/li\u003e\n\u003cli\u003eCompatible with Arrow header pipes for full-system conversion\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003ePart number\u003c\/th\u003e\n\u003ctd\u003e71860AKN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003e2.03 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCanister length\u003c\/th\u003e\n\u003ctd\u003e270 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInlet diameter\u003c\/th\u003e\n\u003ctd\u003e54 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOutlet diameter\u003c\/th\u003e\n\u003ctd\u003e50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCanister material\u003c\/th\u003e\n\u003ctd\u003eAluminium Dark\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eEnd cap material\u003c\/th\u003e\n\u003ctd\u003eCarbon\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInternal components\u003c\/th\u003e\n\u003ctd\u003eStainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRoad approval\u003c\/th\u003e\n\u003ctd\u003eE-number approved (dB killer included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRequired accessory\u003c\/th\u003e\n\u003ctd\u003eConnecting pipe Arrow 71667MI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"Arrow","offers":[{"title":"Default Title","offer_id":53168798466314,"sku":"71860AKN","price":346.29,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/71860AKN.png?v=1780815717","url":"https:\/\/inter-pace.com\/ar\/products\/arrow-71860akn","provider":"Inter-Pace","version":"1.0","type":"link"}