{"product_id":"spark-exhaust-trumpet-slip-on-black-series-triumph-street-twin","title":"Spark Exhaust Trumpet Slip-On Pair Black Series Euro 4 Triumph Street Twin 900 (2017-2018) GTR0402BOM","description":"\u003cp\u003eThe long Trumpet body in black ceramic, with a Euro 4 approval behind it. Of the six Street Twin pairs Spark builds, this is the one that makes the biggest change to the motorcycle's outline and the smallest to its colour.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePair of Trumpet slip-on silencers for the Triumph Street Twin 900, 2017 to 2018.\u003c\/li\u003e\n\u003cli\u003eEuro 4 homologated by the Italian Ministry of Transport.\u003c\/li\u003e\n\u003cli\u003eAISI 304 stainless with black ceramic treatment.\u003c\/li\u003e\n\u003cli\u003e3.5 kg against 7.5 kg standard.\u003c\/li\u003e\n\u003cli\u003eOriginal catalyst retained.\u003c\/li\u003e\n\u003cli\u003e1,012 euro.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhy Ceramic and Not Paint\u003c\/h2\u003e\u003cp\u003eAn exhaust cycles from ambient to several hundred degrees and back, several times a day, for years. Paint on that surface blisters, lifts at the edges and eventually comes off in sheets — which is why home-sprayed pipes always look worse in the second season than the first.\u003c\/p\u003e\u003cp\u003eA ceramic layer is cured into the surface rather than laid on top of it. It does not lift, it does not chip at the outlet, and it does not pass through the straw-to-blue heat tint that bare stainless develops near the header joint.\u003c\/p\u003e\u003ch2\u003eLong and Dark\u003c\/h2\u003e\u003cp\u003eThe Trumpet is the shape that extends the motorcycle backwards. In brushed stainless it does that visibly, drawing a bright line along the flank. In black it does the same to the silhouette while leaving the surface quiet.\u003c\/p\u003e\u003cp\u003eThat combination suits a Street Twin better than it suits most bikes, because the machine is dark everywhere else and a long bright pipe would be the only thing an eye tracks.\u003c\/p\u003e\u003ch2\u003eThe Approval Does Not Change\u003c\/h2\u003e\u003cp\u003eSame Euro 4 homologation as the brushed version, same standard catalyst in place, same certificate from the Italian Ministry of Transport. Spark treats the surface of an already-certified silencer; the coating is not part of how it meets the limit.\u003c\/p\u003e\u003ch2\u003eFive Hundred Grams Behind the 60's\u003c\/h2\u003e\u003cp\u003e3.5 kg here against 3.2 for the shorter 60's pair, and 7.5 for the standard system either way. The Trumpet is the heavier of the two because there is more of it, and four kilos off the tail of the motorcycle is the number that matters.\u003c\/p\u003e\u003ch2\u003eWhere the Gain Sits\u003c\/h2\u003e\u003cp\u003eSpark places the improvement at low and medium revs, which is the honest claim for a 900 twin that keeps its catalyst. A Street Twin makes its torque early and is ridden there, so a system tuned for the top of the range would be helping in a place the rider never visits.\u003c\/p\u003e\u003cp\u003eWhat changes more noticeably is the character. The standard silencers are heavily chambered to meet a drive-by limit cheaply; Spark meets the same limit with a better internal build, and the twin's off-beat pulse comes through instead of being flattened.\u003c\/p\u003e\u003ch2\u003eSold as a Pair\u003c\/h2\u003e\u003cp\u003eTwo silencers and the hardware, in one article. A symmetrical exhaust needs both sides changed together.\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. Brushed stainless: GTR0402IOM. The other black pairs are GTR0401BOM (60's) and GTR0403BOM (Sinfonia).\u003c\/p\u003e\u003ch2\u003eRoad Approval\u003c\/h2\u003e\u003cp\u003eEuro 4 homologated, original catalyst retained.\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePart number: GTR0402BOM\u003c\/li\u003e\n\u003cli\u003eType: Slip-on, pair\u003c\/li\u003e\n\u003cli\u003eDesign: Trumpet\u003c\/li\u003e\n\u003cli\u003eMaterial: AISI 304 stainless steel, black ceramic treatment\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":53610820763914,"sku":"GTR0402BOM","price":153000.0,"currency_code":"NPR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/gtr0402bom_f8b5d734-773b-40db-a0c1-2f9a7c38ca6d.png?v=1788263502","url":"https:\/\/inter-pace.com\/en-np\/products\/spark-exhaust-trumpet-slip-on-black-series-triumph-street-twin","provider":"Inter-Pace","version":"1.0","type":"link"}