{"product_id":"collettore-racing-arrow-51003mi-yamaha-yzf-r-125","title":"Arrow 51003MI Stainless Steel Racing Collector - Yamaha YZF-R 125 (2008-2013)","description":"\u003ch2\u003eArrow Racing Header 51003MI – Yamaha YZF-R 125 (2008-2013)\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eArrow 51003MI stainless steel racing header\u003c\/strong\u003e is the high-performance header system designed for the \u003cstrong\u003eYamaha YZF-R 125 (2008-2013)\u003c\/strong\u003e. Entirely made in Italy by \u003cstrong\u003eArrow Special Parts\u003c\/strong\u003e, this racing header replaces the original header and catalytic converter, unleashing the full potential of the Yamaha single-cylinder engine: \u003cstrong\u003e+1.5 HP and +0.49 Nm\u003c\/strong\u003e with a weight saving of \u003cstrong\u003e3.2 kg\u003c\/strong\u003e compared to the stock exhaust.\u003c\/p\u003e\n\n\u003ch2\u003e✓ Strengths\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e✓ \u003cstrong\u003e+1.5 HP power\u003c\/strong\u003e – from 12 HP stock to 13.5 HP (+12.5% increase)\u003c\/li\u003e\n\u003cli\u003e✓ \u003cstrong\u003e+0.49 Nm torque\u003c\/strong\u003e – from 10.59 Nm to 11.08 Nm for a quicker response\u003c\/li\u003e\n\u003cli\u003e✓ \u003cstrong\u003e-3.2 kg weight\u003c\/strong\u003e – significant lightening for a 125cc\u003c\/li\u003e\n\u003cli\u003e✓ \u003cstrong\u003eHigh-quality stainless steel\u003c\/strong\u003e – corrosion and high-temperature resistance\u003c\/li\u003e\n\u003cli\u003e✓ \u003cstrong\u003e40 mm outlet diameter\u003c\/strong\u003e – optimized gas flow for the 125 single-cylinder\u003c\/li\u003e\n\u003cli\u003e✓ \u003cstrong\u003eMade in Italy\u003c\/strong\u003e – designed and produced by Arrow Special Parts in San Giustino (PG)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical Features\u003c\/h2\u003e\n\n\u003ch3\u003e🔧 Specifications\u003c\/h3\u003e\n\u003cp\u003eComplete \u003cstrong\u003eracing\u003c\/strong\u003e header in \u003cstrong\u003estainless steel\u003c\/strong\u003e. Outlet diameter \u003cstrong\u003e40 mm\u003c\/strong\u003e. Total weight \u003cstrong\u003e0.6 – 0.8 kg\u003c\/strong\u003e. Without DB Killer, without Lambda sensor, without CO sensor. This header is \u003cstrong\u003eNOT road legal\u003c\/strong\u003e: it is a racing product intended exclusively for closed-circuit competitions or track use.\u003c\/p\u003e\n\n\u003ch3\u003e⚡ Verified Performance\u003c\/h3\u003e\n\u003cp\u003eWheel measurements on a dyno (source: Arrow Special Parts):\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStock power:\u003c\/strong\u003e 12.00 HP at 9,300 rpm → \u003cstrong\u003eWith Arrow: 13.5 HP at 9,300 rpm\u003c\/strong\u003e (+1.5 HP)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStock torque:\u003c\/strong\u003e 10.59 Nm at 7,800 rpm → \u003cstrong\u003eWith Arrow: 11.08 Nm at 7,800 rpm\u003c\/strong\u003e (+0.49 Nm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStock exhaust weight:\u003c\/strong\u003e 5.50 kg → \u003cstrong\u003eWith Arrow: -3.20 kg\u003c\/strong\u003e saving\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNoise:\u003c\/strong\u003e 86 dB stock → 88 dB with Arrow (+2 dB)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e🔗 Arrow Silencer Compatibility\u003c\/h3\u003e\n\u003cp\u003eThis racing header is designed to work with the following Arrow silencers for Yamaha YZF-R 125:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e51503AON\u003c\/strong\u003e – Street Thunder Aluminium Dark\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e51503AO\u003c\/strong\u003e – Street Thunder Aluminium\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe silencer is sold separately. For those who need \u003cstrong\u003eroad homologation\u003c\/strong\u003e, Arrow also produces the Euro 3 approved catalytic header kit with code \u003cstrong\u003e51003KZ\u003c\/strong\u003e (sold separately in our store).\u003c\/p\u003e\n\n\u003ch3\u003e🏍️ Vehicle Compatibility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eYamaha YZF-R 125\u003c\/strong\u003e – year 2008\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYamaha YZF-R 125\u003c\/strong\u003e – year 2009\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYamaha YZF-R 125\u003c\/strong\u003e – year 2010\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYamaha YZF-R 125\u003c\/strong\u003e – year 2011\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYamaha YZF-R 125\u003c\/strong\u003e – year 2012\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYamaha YZF-R 125\u003c\/strong\u003e – year 2013\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePlease note:\u003c\/strong\u003e this header is specific for the YZF-R 125 years 2008-2013. For 2014 and later versions, Arrow produces dedicated headers with different codes. Please check the exact year of your motorcycle before purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWho It's Perfect For\u003c\/h2\u003e\n\u003cp\u003eThe Arrow 51003MI racing header is the ideal choice for those who use the \u003cstrong\u003eYamaha YZF-R 125\u003c\/strong\u003e on the \u003cstrong\u003etrack, for track days, one-make races or trophies\u003c\/strong\u003e and wish to extract maximum performance from the 125cc single-cylinder. Perfect for young riders and enthusiasts who want an aggressive racing sound and a concrete gain in power and torque, with significant weight reduction for the motorcycle.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty and Quality\u003c\/h2\u003e\n\u003cp\u003eOriginal product by \u003cstrong\u003eArrow Special Parts\u003c\/strong\u003e, Italian excellence in motorcycle exhaust systems since 1985. Sold by \u003cstrong\u003eMoon Bike S.r.l.\u003c\/strong\u003e, authorized dealer based in Cercola (NA). Fast and secure shipping throughout Italy and worldwide.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e🛒 Order the Arrow 51003MI racing header now and unleash the power of your R125!\u003c\/strong\u003e\u003c\/p\u003e","brand":"Arrow","offers":[{"title":"Default Title","offer_id":57062874972508,"sku":"51003MI","price":162.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0966\/3660\/0668\/files\/Collettore_Racing_per_Yamaha_YZF-R_125_20082013_-_Arrow_51003MI_page1.png?v=1775597645","url":"https:\/\/www.moonbikesrl.it\/en-de\/products\/collettore-racing-arrow-51003mi-yamaha-yzf-r-125","provider":"Moon Bike S.r.l.","version":"1.0","type":"link"}