{"product_id":"arrow-thunder-alluminio-terminale-51509ao-aprilia-rs4-125","title":"Arrow Thunder Aluminium Approved Silencer – Aprilia RS4 125 (2011-2016)","description":"\u003cdiv style=\"font-family:'Segoe UI',Arial,sans-serif;max-width:900px;margin:0 auto;color:#222;line-height:1.7;\"\u003e\n\n  \u003cp style=\"font-size:16px;\"\u003e\n    The \u003cstrong\u003eArrow Thunder aluminum silencer\u003c\/strong\u003e (code 51509AO) is an approved slip-on exhaust designed for the \u003cstrong\u003eAprilia RS4 125 (2011-2016)\u003c\/strong\u003e. It mounts directly onto the original headers without any modifications, offering increased performance, significant weight reduction, and a more engaging sound. Produced entirely in Italy by Arrow Special Parts, official technical partner of Aprilia.\n  \u003c\/p\u003e\n\n  \u003ch3 style=\"color:#1a1a1a;border-bottom:2px solid #e63946;padding-bottom:6px;\"\u003e✓ Strengths\u003c\/h3\u003e\n  \u003cul style=\"font-size:15px;\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eE9 approved\u003c\/strong\u003e according to European directive 97\/24\/CE chapter 9 (with catalytic converter 11013KZ)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAluminum body\u003c\/strong\u003e with stainless steel end cap — lightness and corrosion resistance\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003e+2.00 HP power\u003c\/strong\u003e and \u003cstrong\u003e+1.18 Nm torque\u003c\/strong\u003e compared to the original exhaust\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003e-2.70 kg weight\u003c\/strong\u003e compared to the stock silencer\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDB Killer included\u003c\/strong\u003e and removable\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePlug \u0026amp; play installation\u003c\/strong\u003e on original headers, no modifications needed\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMade in Italy\u003c\/strong\u003e — Arrow Special Parts, official technical partner of Aprilia\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3 style=\"color:#1a1a1a;border-bottom:2px solid #e63946;padding-bottom:6px;\"\u003eTechnical specifications\u003c\/h3\u003e\n  \u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px;\"\u003e\n    \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eArrow Special Parts\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eThunder Aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eProduct code\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e51509AO\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eSlip-on silencer for original headers\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eApproval\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eE9 — Directive 97\/24\/CE chapter 9 (only with catalytic converter 11013KZ)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eBody material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eRear end cap material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eStainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eSilencer inner material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eStainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eHeader material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eStainless steel (original headers)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eFrame mounting\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eWelded bracket\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eBody length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e350 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eInlet diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e36 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eOutlet diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eDB Killer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eYes, included and removable\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eSilencer weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e2.90 – 3.00 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\n  \u003ch3 style=\"color:#1a1a1a;border-bottom:2px solid #e63946;padding-bottom:6px;\"\u003ePerformance data (on original headers)\u003c\/h3\u003e\n  \u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px;\"\u003e\n    \u003ctr style=\"background:#e63946;color:#fff;\"\u003e\n      \u003cth style=\"padding:8px;border:1px solid #ddd;\"\u003eParameter\u003c\/th\u003e\n      \u003cth style=\"padding:8px;border:1px solid #ddd;\"\u003eValue\u003c\/th\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003ePower increase\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003e+2.00 HP\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eTorque increase\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003e+1.18 Nm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eWeight reduction\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\n\u003cstrong\u003e-2.70 kg\u003c\/strong\u003e compared to original\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eStatic noise\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\n\u003cstrong\u003e+2 dB\u003c\/strong\u003e compared to original\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\n  \u003cdiv style=\"background:#fff3cd;border-left:4px solid #ffc107;padding:14px;margin:20px 0;border-radius:4px;\"\u003e\n    \u003cstrong\u003e⚠️ Important notes:\u003c\/strong\u003e\u003cbr\u003e\n    • \u003cstrong\u003eApproval is ONLY valid with the Arrow 11013KZ catalytic converter present\u003c\/strong\u003e (sold separately). Without a catalytic converter, the silencer is NOT approved for road use.\u003cbr\u003e\n    • The silencer mounts on the \u003cstrong\u003eoriginal Aprilia headers\u003c\/strong\u003e, no modifications to the frame or system are necessary.\u003cbr\u003e\n    • Mounting kit included in the package.\u003cbr\u003e\n    • Homologation certificate included, to be attached to the motorcycle registration document.\u003cbr\u003e\n    • Not compatible with Aprilia RS4 125 from 2017 onwards (they require different codes).\n  \u003c\/div\u003e\n\n  \u003ch3 style=\"color:#1a1a1a;border-bottom:2px solid #e63946;padding-bottom:6px;\"\u003eVehicle compatibility\u003c\/h3\u003e\n  \u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px;\"\u003e\n    \u003ctr style=\"background:#e63946;color:#fff;\"\u003e\n      \u003cth style=\"padding:8px;border:1px solid #ddd;\"\u003eMake\u003c\/th\u003e\n      \u003cth style=\"padding:8px;border:1px solid #ddd;\"\u003eModel\u003c\/th\u003e\n      \u003cth style=\"padding:8px;border:1px solid #ddd;\"\u003eEngine type\u003c\/th\u003e\n      \u003cth style=\"padding:8px;border:1px solid #ddd;\"\u003eYears\u003c\/th\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eAprilia\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eRS4 125\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eTW\u003c\/td\u003e\n      \u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e2011 – 2016\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/table\u003e\n\n  \u003ch3 style=\"color:#1a1a1a;border-bottom:2px solid #e63946;padding-bottom:6px;\"\u003eRequired and recommended products\u003c\/h3\u003e\n  \u003cul style=\"font-size:15px;\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e🔴 REQUIRED for approval:\u003c\/strong\u003e Arrow Catalytic converter \u003cstrong\u003e11013KZ\u003c\/strong\u003e — mandatory to make the silencer road-approved\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRecommended:\u003c\/strong\u003e Arrow racing link pipe \u003cstrong\u003e51013MI\u003c\/strong\u003e — as an alternative to the catalytic converter for racing\/track use (NOT approved)\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3 style=\"color:#1a1a1a;border-bottom:2px solid #e63946;padding-bottom:6px;\"\u003eWho it's perfect for\u003c\/h3\u003e\n  \u003cp style=\"font-size:15px;\"\u003e\n    The Arrow Thunder Aluminum silencer is the ideal choice for Aprilia RS4 125 owners who want to improve their bike's performance and sound while remaining compliant with road homologation. Perfect for those looking for a lightweight silencer with an aggressive design and a brand recognized in the world of competitions. Also ideal as a first upgrade for new riders with A1 motorcycles.\n  \u003c\/p\u003e\n\n  \u003cdiv style=\"background:#f0f7f0;border-left:4px solid #28a745;padding:14px;margin:20px 0;border-radius:4px;\"\u003e\n    \u003cstrong\u003e🛡️ Warranty and quality\u003c\/strong\u003e\u003cbr\u003e\n    \u003cstrong\u003eOriginal Arrow Special Parts\u003c\/strong\u003e product, Made in Italy. Moon Bike S.r.l. is an authorized Arrow dealer based in Cercola (NA). All Arrow exhausts are covered by the manufacturer's warranty and comply with current European regulations.\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Arrow","offers":[{"title":"Default Title","offer_id":57062984417628,"sku":"51509AO","price":401.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0966\/3660\/0668\/files\/Arrow_Terminale_Thunder_Alluminio_Omologato__Aprilia_RS4_125_2011-2016_page1.png?v=1775847601","url":"https:\/\/www.moonbikesrl.it\/en-gb\/products\/arrow-thunder-alluminio-terminale-51509ao-aprilia-rs4-125","provider":"Moon Bike S.r.l.","version":"1.0","type":"link"}