{"product_id":"spark-exhaust-db-killer-round-megaphone-34-degrees-monster","title":"Spark Exhaust dB Killer Round and Megaphone 34° 28 Holes Ducati Monster G9914","description":"\u003cp\u003eTwenty-eight holes and a thirty-four degree seat. The most steeply angled insert Spark builds, for the round and Megaphone cases — and the one it names the Ducati Monster against.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003edB killer for Spark round and Megaphone silencers.\u003c\/li\u003e\n\u003cli\u003eØ 47 mm outer, 32 mm internal bore.\u003c\/li\u003e\n\u003cli\u003e34° seat angle.\u003c\/li\u003e\n\u003cli\u003ePerforated: 28 holes.\u003c\/li\u003e\n\u003cli\u003eListed by Spark for Ducati Monster applications.\u003c\/li\u003e\n\u003cli\u003eStainless steel, removable.\u003c\/li\u003e\n\u003cli\u003eSpark part number G9914, made in Mantova, Italy.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTwenty-Eight Holes Instead of a Straight Bore\u003c\/h2\u003e\u003cp\u003eA perforated insert works differently from an open one. Instead of narrowing the exit to a single smaller opening, it makes the gas pass through a wall of small holes, breaking the column up before it leaves. Total flow area can be similar; the acoustic result is not.\u003c\/p\u003e\u003cp\u003ePerforation kills more noise for the same restriction, and it changes the character of what is left — less edge, more body. On a big V-twin that is usually what the owner wanted in the first place.\u003c\/p\u003e\u003ch2\u003eThirty-Four Degrees\u003c\/h2\u003e\u003cp\u003eThat is a steep seat, and it exists because the cases this fits are cut at that angle. Trying to fit an 18° insert into a 34° outlet leaves a gap on one side; the part will not seal and it will not stay.\u003c\/p\u003e\u003cp\u003eAngle first, then bore. It is the order to check in when you are matching an insert to a silencer you did not buy new.\u003c\/p\u003e\u003ch2\u003eNamed for the Monster\u003c\/h2\u003e\u003cp\u003eSpark lists the Ducati Monster specifically against this article, which tells you where most of them end up. The Monster's round Spark cases take exactly this geometry, and a Monster is also the kind of motorcycle whose owner is likely to need the insert at some point.\u003c\/p\u003e\u003cp\u003eIt is not a fitment restriction. Any Spark round or Megaphone case with a 34° outlet takes it.\u003c\/p\u003e\u003ch2\u003eNot a Legal Fix\u003c\/h2\u003e\u003cp\u003eThe insert changes the reading on a sound meter. It does not create a certificate, and it does not turn a Custom Works silencer into a homologated one. That distinction matters at a technical inspection and it is worth being clear about.\u003c\/p\u003e\u003ch2\u003eOne Per Silencer\u003c\/h2\u003e\u003cp\u003eOrder one for each case. A Monster running two Spark round silencers needs two of these — same article number twice, since the part is symmetrical.\u003c\/p\u003e","brand":"Spark Exhaust","offers":[{"title":"Default Title","offer_id":53617778491658,"sku":"G9914","price":495.0,"currency_code":"BOB","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/G9914_25f8040f-5f1a-47c0-bcd5-02268ae06399.png?v=1788343189","url":"https:\/\/inter-pace.com\/en-bo\/products\/spark-exhaust-db-killer-round-megaphone-34-degrees-monster","provider":"Inter-Pace","version":"1.0","type":"link"}