{"product_id":"spark-exhaust-db-killer-rectangular-150mm-open","title":"Spark Exhaust dB Killer Rectangular 150 mm Open Universal G9915","description":"\u003cp\u003eA rectangular insert for a rectangular case. Spark's flat-sided silencers need a plug that matches their section, and this is the long one — a hundred and fifty millimetres.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003edB killer for Spark rectangular silencers.\u003c\/li\u003e\n\u003cli\u003e59.8 × 35.8 mm outer, 41.3 × 15.3 mm internal opening.\u003c\/li\u003e\n\u003cli\u003e150 mm long.\u003c\/li\u003e\n\u003cli\u003eOpen type — no perforated section.\u003c\/li\u003e\n\u003cli\u003eStainless steel, removable.\u003c\/li\u003e\n\u003cli\u003eSpark part number G9915, made in Mantova, Italy.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eRectangular Means Rectangular\u003c\/h2\u003e\u003cp\u003eNothing round fits a rectangular case, and a rectangular insert has two dimensions to get right instead of one. Fifty-nine point eight by thirty-five point eight is the seat; forty-one point three by fifteen point three is what the gas gets through.\u003c\/p\u003e\u003cp\u003eThat internal opening is a slot rather than a hole, and it is deliberately narrow in one axis. A tall thin opening presents more wall to the gas per unit of area than a round one would, which is where the attenuation comes from in an insert with no perforation.\u003c\/p\u003e\u003ch2\u003eThe Long One\u003c\/h2\u003e\u003cp\u003eSpark builds two rectangular inserts. This is the 150 mm version with the smaller opening; G9920 is 70 mm long with a much larger one. They are not alternatives for the same job — the long, narrow one takes far more noise out.\u003c\/p\u003e\u003cp\u003eCheck the length available in your case before ordering. A hundred and fifty millimetres of insert needs a hundred and fifty millimetres of straight section behind the outlet.\u003c\/p\u003e\u003ch2\u003eWhich Silencers\u003c\/h2\u003e\u003cp\u003eSpark's rectangular family, which it has fitted to Ducati and to several sports machines over the years. If you are matching an insert to a case you already own, the seat dimensions are the reliable check: measure the outlet opening across both axes.\u003c\/p\u003e\u003ch2\u003eAn Older Family, Still Listed\u003c\/h2\u003e\u003cp\u003eThe rectangular cases are not what Spark builds most of today, and the fact that both inserts remain in the 2026 price list is the useful part. An exhaust from an earlier generation stays serviceable.\u003c\/p\u003e\u003ch2\u003eApproval\u003c\/h2\u003e\u003cp\u003eNot affected by this article. Where the silencer is homologated the insert is part of the certified configuration and must stay in; where it is not, fitting the insert does not create a certificate.\u003c\/p\u003e","brand":"Spark Exhaust","offers":[{"title":"Default Title","offer_id":53617781145866,"sku":"G9915","price":213.0,"currency_code":"MYR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/5b865c0d2508f_0eb29ade-367d-4cb5-bdc5-98d095490333.png?v=1788343238","url":"https:\/\/inter-pace.com\/en-my\/products\/spark-exhaust-db-killer-rectangular-150mm-open","provider":"Inter-Pace","version":"1.0","type":"link"}