{"product_id":"arrow-71860pk","title":"Arrow Thunder Titanium Slip-On Silencer KTM RC 390 2017-2020 – 71860PK","description":"\u003cp\u003eRoad-legal, lightweight and built to last, the Arrow Thunder Titanium slip-on silencer for the KTM RC 390 (2017–2020) carries a full E-number type approval so you can ride with complete confidence on public roads. At just 1.73 kg, the titanium canister sheds meaningful unsprung mass, sharpening throttle response and giving the RC 390 a more urgent, free-revving character without sacrificing compliance.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eE-number road approval and integrated DB-killer ensure the exhaust meets legal noise limits straight out of the box — no guesswork, no risk of failing roadside checks.\u003c\/li\u003e\n\u003cli\u003eTitanium outer canister: exceptionally heat-resistant and corrosion-resistant, keeping weight to just 1.73 kg for noticeably crisper throttle response.\u003c\/li\u003e\n\u003cli\u003eCarbon end cap adds a race-bred aesthetic while contributing to the minimal overall weight.\u003c\/li\u003e\n\u003cli\u003eStainless steel internals guarantee long-term durability and consistent flow characteristics over the life of the silencer.\u003c\/li\u003e\n\u003cli\u003e270 mm canister length with a 50 mm outlet and 54 mm inlet — dimensions tuned for optimal flow and mid-range punch on the RC 390 platform.\u003c\/li\u003e\n\u003cli\u003eCombinable with an Arrow header to build a full Arrow exhaust system for maximum performance gains.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCertification and Road Legality\u003c\/h2\u003e\u003cp\u003eThe 71860PK carries an E-number homologation, confirming it has passed the relevant European type-approval tests for road use. The factory-fitted DB-killer controls sound output to within statutory limits. This makes the Arrow Thunder the responsible choice for riders who want a performance upgrade that remains fully street-legal — no re-mapping or paperwork headaches on an MOT or TÜV inspection.\u003c\/p\u003e\u003ch2\u003eBuild Quality and Materials\u003c\/h2\u003e\u003cp\u003eArrow constructs the Thunder canister from aerospace-grade titanium, a material that tolerates sustained high exhaust temperatures without discolouring structurally or losing integrity. The natural heat tint that develops on a titanium can is a mark of quality, not a flaw. Inside, a stainless steel baffle and packing deliver consistent back-pressure characteristics throughout the silencer's service life. The carbon fibre end cap is not merely cosmetic — it resists heat conducted from the canister and is significantly lighter than an equivalent aluminium cap, keeping the rearward weight bias of the RC 390 in check.\u003c\/p\u003e\u003ch2\u003eInstallation Note\u003c\/h2\u003e\u003cp\u003eThe Arrow Thunder 71860PK is a slip-on silencer and requires the Arrow connecting pipe 71667MI for installation. This connecting pipe is sold separately. Once fitted with the appropriate link pipe, the combination can be further upgraded by adding an Arrow header to create a complete Arrow exhaust system.\u003c\/p\u003e\u003ch2\u003eFitment and Compatibility\u003c\/h2\u003e\u003cp\u003eEngineered specifically for the KTM RC 390, model years 2017, 2018, 2019 and 2020. No modification to the stock header or airbox is required when using the recommended connecting pipe 71667MI.\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePart number: 71860PK\u003c\/li\u003e\n\u003cli\u003eFitment: KTM RC 390 (2017–2020)\u003c\/li\u003e\n\u003cli\u003eWeight: 1.73 kg\u003c\/li\u003e\n\u003cli\u003eCanister length: 270 mm\u003c\/li\u003e\n\u003cli\u003eInlet diameter: 54 mm\u003c\/li\u003e\n\u003cli\u003eOutlet diameter: 50 mm\u003c\/li\u003e\n\u003cli\u003eCanister material: titanium\u003c\/li\u003e\n\u003cli\u003eEnd cap material: carbon fibre\u003c\/li\u003e\n\u003cli\u003eInternal components material: stainless steel\u003c\/li\u003e\n\u003cli\u003eRoad approval: E-number homologated\u003c\/li\u003e\n\u003cli\u003eDB-killer: included (integrated)\u003c\/li\u003e\n\u003cli\u003eConnecting pipe required: Arrow 71667MI (sold separately)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Arrow","offers":[{"title":"Default Title","offer_id":53168798302474,"sku":"71860PK","price":483.14,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/71860PK.png?v=1780815700","url":"https:\/\/inter-pace.com\/id\/products\/arrow-71860pk","provider":"Inter-Pace","version":"1.0","type":"link"}