{"product_id":"spark-exhaust-db-killer-round-old-32mm-18-degrees","title":"Spark Exhaust dB Killer Round Old Style 32 mm 18° Open Universal G9912","description":"\u003cp\u003eThe eighteen-degree insert for Spark's older round cases. If your silencer predates the current families and takes a slanted plug rather than a straight one, this is the part number.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003edB killer for Spark round silencers, older generation.\u003c\/li\u003e\n\u003cli\u003eØ 47 mm outer, 32 mm internal bore.\u003c\/li\u003e\n\u003cli\u003e18° seat angle.\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 G9912, made in Mantova, Italy.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhy an Angle\u003c\/h2\u003e\u003cp\u003eNot every silencer outlet is cut square. Where the end cap sits at a slant, the insert has to sit at the same slant or it will not seat — and an insert that does not seat rattles, works loose and eventually leaves the motorcycle at speed.\u003c\/p\u003e\u003cp\u003eEighteen degrees is the figure for this generation of round cases. Spark also builds a 16° version for the GP Style and a 34° version for the newer round and Megaphone cases; the numbers are not interchangeable and the difference is not something you can eyeball.\u003c\/p\u003e\u003ch2\u003eOld Style, Still Supported\u003c\/h2\u003e\u003cp\u003eSpark keeps this article in the current price list for silencers it no longer builds. That is worth noting: an exhaust bought fifteen years ago can still be brought back to a usable noise level with a part that costs less than an hour of workshop time.\u003c\/p\u003e\u003cp\u003eIf you are not sure which generation your silencer belongs to, measure the outlet bore and the seat angle and send us both.\u003c\/p\u003e\u003ch2\u003eThirty-Two Millimetres\u003c\/h2\u003e\u003cp\u003eThe bore is the number that decides how much the insert actually does. Thirty-two through a forty-seven millimetre case is a substantial narrowing, and on a large-capacity single or twin it is audible immediately.\u003c\/p\u003e\u003ch2\u003eApproval\u003c\/h2\u003e\u003cp\u003eNone, and none conferred. This is a noise-management part for track and paddock use. A silencer without a certificate does not gain one because an insert has been fitted, whatever the reduction measures.\u003c\/p\u003e\u003ch2\u003eStainless, Because It Comes Out Again\u003c\/h2\u003e\u003cp\u003eAn insert lives in the hottest, dirtiest part of the exhaust and gets pulled out and pushed back in repeatedly. Stainless tolerates that: it does not gall against the case wall and it does not seize into a silencer that has been left standing over a winter.\u003c\/p\u003e\u003ch2\u003eOrdering\u003c\/h2\u003e\u003cp\u003eOne insert per silencer. On a twin-can installation with two round cases you need two, and they are the same article — unlike the angled Moto GP cases, this one has no left or right.\u003c\/p\u003e","brand":"Spark Exhaust","offers":[{"title":"Default Title","offer_id":53617777836298,"sku":"G9912","price":237.04,"currency_code":"DKK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/G9912_34045ce2-1350-4022-8282-98ed989d08c2.png?v=1788343181","url":"https:\/\/inter-pace.com\/en-gl\/products\/spark-exhaust-db-killer-round-old-32mm-18-degrees","provider":"Inter-Pace","version":"1.0","type":"link"}