{"product_id":"spark-exhaust-db-killer-grid-o-32mm","title":"Spark Exhaust dB Killer Grid-O 32 mm Open 100 mm Universal G9987","description":"\u003cp\u003eThirty-two millimetres — the narrowest Grid-O insert Spark builds, and the one to reach for when a circuit's limit is genuinely tight.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003edB killer for Spark Grid-O silencers.\u003c\/li\u003e\n\u003cli\u003eØ 51.5 mm outer, 32 mm internal bore, 100 mm long.\u003c\/li\u003e\n\u003cli\u003eOpen type, no perforation.\u003c\/li\u003e\n\u003cli\u003eThe most restrictive of the four Grid-O inserts.\u003c\/li\u003e\n\u003cli\u003eStainless steel, removable.\u003c\/li\u003e\n\u003cli\u003eSpark part number G9987, made in Mantova, Italy.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eThe Bottom of the Ladder\u003c\/h2\u003e\u003cp\u003eSpark's four Grid-O inserts run 32, 38, 40 and 45 millimetres. This is the smallest, and the step down from 38 is worth about a quarter of the flow area — a real intervention rather than a trim.\u003c\/p\u003e\u003cp\u003eTake it when the machine is well over a limit and the alternative is not riding. On a small engine it costs less than you would expect; on a large one it will be felt.\u003c\/p\u003e\u003ch2\u003eA Hundred Millimetres\u003c\/h2\u003e\u003cp\u003eShorter than the 38 mm insert's hundred and fifty, which makes it easier to accommodate in a case with limited clear length behind the outlet. Between bore and length, bore is doing most of the work here.\u003c\/p\u003e\u003ch2\u003eThe Grid-O Case\u003c\/h2\u003e\u003cp\u003eSix hundred grams of titanium with a woven mesh across the outlet, developed on the Triumph Moto2 engine. It is Spark's most extreme silencer and, unsurprisingly, the family whose owners most often need an insert.\u003c\/p\u003e\u003cp\u003eEvery Grid-O takes a 51.5 mm insert body. Only the bore differs, and that is what you order by.\u003c\/p\u003e\u003ch2\u003eMeasuring Before You Order\u003c\/h2\u003e\u003cp\u003eIf the silencer came to you without its insert, the outlet bore is the figure to establish. Four articles share one outer diameter and only the internal opening separates them; a photograph will not tell you which one you need.\u003c\/p\u003e\u003cp\u003eSend us the exhaust's article number instead and we will look it up.\u003c\/p\u003e\u003ch2\u003eFifty-One and a Half Millimetres of Body\u003c\/h2\u003e\u003cp\u003eCommon to all four Grid-O inserts, which is why they cannot be told apart on a shelf. If you own more than one, mark the bore on the flange with a punch — it takes a minute and saves a wrong fitting on a trackday morning.\u003c\/p\u003e\u003ch2\u003eLegal Position\u003c\/h2\u003e\u003cp\u003eAn insert manages noise; it does not create approval. On a homologated Spark exhaust the plug that came with it is the one the certificate describes, and substituting a different bore puts the machine outside the tested configuration.\u003c\/p\u003e","brand":"Spark Exhaust","offers":[{"title":"Default Title","offer_id":53617783275786,"sku":"G9987","price":47.06,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/65c4d8a1e3d5c_dbc1aaa7-2078-4289-898c-8b6eae72507d.png?v=1788343293","url":"https:\/\/inter-pace.com\/en-gh\/products\/spark-exhaust-db-killer-grid-o-32mm","provider":"Inter-Pace","version":"1.0","type":"link"}