{"product_id":"spark-exhaust-sinfonia-slip-on-stainless-triumph-street-twin","title":"Spark Exhaust Sinfonia Slip-On Pair Stainless Euro 4 Triumph Street Twin 900 (2017-2018) GTR0403IOM","description":"\u003cp\u003eThe middle choice. A Sinfonia body is straighter-sided than the Trumpet and longer than the 60's, and on a Street Twin it is the pair that changes the least about how the motorcycle looks while still changing what it weighs and what it sounds like.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePair of Sinfonia slip-on silencers for the Triumph Street Twin 900, 2017 to 2018.\u003c\/li\u003e\n\u003cli\u003eEuro 4 homologated.\u003c\/li\u003e\n\u003cli\u003eAISI 304 stainless, Scotch-Brite finish.\u003c\/li\u003e\n\u003cli\u003e3.5 kg against 7.5 kg standard.\u003c\/li\u003e\n\u003cli\u003eStraight-sided body, square outlet.\u003c\/li\u003e\n\u003cli\u003eOriginal catalyst retained.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eStraight Rather Than Tapered\u003c\/h2\u003e\u003cp\u003eThe three shapes Spark offers here differ mostly in what the body does along its length. The 60's rises and cuts off at an angle. The Trumpet tapers and opens. The Sinfonia runs close to parallel and finishes square.\u003c\/p\u003e\u003cp\u003eParallel is the quietest of the three visually. It reads as a well-made standard silencer rather than as an accessory, which on a bike people buy for its restraint is a real argument.\u003c\/p\u003e\u003ch2\u003eBuying a Pair\u003c\/h2\u003e\u003cp\u003eA Street Twin carries a silencer on each side and Spark supplies both in one article. That is not a detail worth glossing over, because the price comparison people make in their head is usually against a single aftermarket can.\u003c\/p\u003e\u003cp\u003e856 euro buys the pair, the mounting hardware and a type approval. Reckoned that way it is not an expensive exhaust.\u003c\/p\u003e\u003ch2\u003eThe Catalyst Stays Where It Is\u003c\/h2\u003e\u003cp\u003eSpark's approval covers this system with the original catalytic converter in place. There is no decat pipe hidden in the box and no instruction to remove anything, which is why the paperwork holds.\u003c\/p\u003e\u003cp\u003eIt also means the performance claim is modest and honest: an improvement at low and medium revs, not a headline figure. A 900 cc parallel twin with the standard cat is not going to gain ten horsepower from a silencer, and Spark does not pretend otherwise.\u003c\/p\u003e\u003ch2\u003eFour Kilos Off the Tail\u003c\/h2\u003e\u003cp\u003e7.5 kg standard against 3.5 fitted. The saving sits high and behind the rear axle line, which is the least helpful place to carry weight on any motorcycle and the most noticeable place to lose it.\u003c\/p\u003e\u003ch2\u003eScotch-Brite, and Why It Suits This Bike\u003c\/h2\u003e\u003cp\u003eThe stainless is brushed rather than polished. A Street Twin is a deliberately matte motorcycle — black engine cases, satin paint, brushed alloy — and a mirror-polished silencer would be the only thing on it shining.\u003c\/p\u003e\u003cp\u003eBrushed stainless sits at the same level of brightness as the fork lowers and the bar clamps, which is why Spark finishes the road range this way rather than chroming it.\u003c\/p\u003e\u003ch2\u003eInstallation\u003c\/h2\u003e\u003cp\u003eSlip-on level: the standard silencers come off and Spark's go on, header pipes untouched. The approval covers the exhaust as delivered, so nothing about the fitting is a compromise on the paperwork.\u003c\/p\u003e\u003ch2\u003eFitment \u0026amp; Compatibility\u003c\/h2\u003e\u003cp\u003eTriumph Street Twin 900, 2017 and 2018. The black ceramic version is GTR0403BOM. The other shapes: 60's, GTR0401IOM and GTR0401BOM; Trumpet, GTR0402IOM and GTR0402BOM.\u003c\/p\u003e\u003ch2\u003eRoad Approval\u003c\/h2\u003e\u003cp\u003eEuro 4 homologated, approval released by the Italian Ministry of Transport, original catalyst retained.\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePart number: GTR0403IOM\u003c\/li\u003e\n\u003cli\u003eType: Slip-on, pair\u003c\/li\u003e\n\u003cli\u003eDesign: Sinfonia\u003c\/li\u003e\n\u003cli\u003eMaterial: AISI 304 stainless steel, Scotch-Brite finish\u003c\/li\u003e\n\u003cli\u003eWeight: 3.5 kg (standard 7.5 kg)\u003c\/li\u003e\n\u003cli\u003eRoad approval: Euro 4 homologated\u003c\/li\u003e\n\u003cli\u003eFitment: Triumph Street Twin 900 (2017-2018)\u003c\/li\u003e\n\u003cli\u003eManufacturer: Spark Exhaust Technology, Mantova, Italy\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Spark Exhaust","offers":[{"title":"Default Title","offer_id":53610812145930,"sku":"GTR0403IOM","price":719.33,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/6748776387f59_2e2c7e98-68c3-43cc-9ad8-5fb47532ea26.png?v=1788254027","url":"https:\/\/inter-pace.com\/en-ge\/products\/spark-exhaust-sinfonia-slip-on-stainless-triumph-street-twin","provider":"Inter-Pace","version":"1.0","type":"link"}