{"product_id":"spark-exhaust-db-killer-hot-road-35mm-12-holes","title":"Spark Exhaust dB Killer Hot Road 35 mm 12 Holes Universal G9977","description":"\u003cp\u003eTwelve holes — the fewest of any Spark insert — through a thirty-five millimetre bore. The Hot Road case gets an insert of its own because nothing else in the range shares its outlet.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003edB killer for Spark Hot Road silencers.\u003c\/li\u003e\n\u003cli\u003eØ 42.7 mm outer, 35 mm internal bore.\u003c\/li\u003e\n\u003cli\u003ePerforated: 12 holes.\u003c\/li\u003e\n\u003cli\u003eStainless steel, removable.\u003c\/li\u003e\n\u003cli\u003eSpark part number G9977, made in Mantova, Italy.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eA Narrow Body, a Wide Bore\u003c\/h2\u003e\u003cp\u003eForty-two point seven outside, thirty-five inside. That is an unusually thin annulus — less than four millimetres of wall and perforation all the way round — and it is what the Hot Road's outlet geometry allows.\u003c\/p\u003e\u003cp\u003eIt also explains the hole count. There is not much surface to put holes in, so Spark used twelve larger ones rather than the twenty-eight small ones it puts in the round-case inserts.\u003c\/p\u003e\u003ch2\u003eMade for the Cut Outlet\u003c\/h2\u003e\u003cp\u003eThe Hot Road ends in a long diagonal slash rather than a square cut, which means the insert seats against an oval opening rather than a circular one. That is why this article exists as a separate number instead of sharing with the vintage cases.\u003c\/p\u003e\u003cp\u003eLeft-hand and right-hand Hot Road silencers take the same insert. The case is mirrored; the outlet section is not.\u003c\/p\u003e\u003ch2\u003eTwelve Holes, and What They Do\u003c\/h2\u003e\u003cp\u003eFewer, larger holes attenuate lower frequencies less and higher ones more than many small ones would. On the kind of large-capacity twin a Hot Road usually ends up on, that keeps the low note the owner bought the exhaust for while taking the hard edge off the top.\u003c\/p\u003e\u003ch2\u003eNot Supplied With the Silencer\u003c\/h2\u003e\u003cp\u003eUnlike Spark's vintage cases, the Hot Road universal silencers are not listed with an insert included. If you are ordering a Hot Road and expect to need noise control, add this article to the same order.\u003c\/p\u003e\u003ch2\u003eLeft and Right Take the Same Part\u003c\/h2\u003e\u003cp\u003eSpark builds the Hot Road as a mirrored pair, G00SI18I and G00SI19I, but the outlet section is common to both. A build running one of each needs two of this insert, ordered as the same number twice.\u003c\/p\u003e\u003ch2\u003eApproval\u003c\/h2\u003e\u003cp\u003eThe Hot Road carries none and neither does this. It is a noise part for circuits and for making a loud custom bearable, and it makes no difference to what an inspector sees on paper.\u003c\/p\u003e","brand":"Spark Exhaust","offers":[{"title":"Default Title","offer_id":53617779212554,"sku":"G9977","price":23100.0,"currency_code":"XOF","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/629070658a812_1318b521-2938-47d3-8f89-d1574c514b63.png?v=1788354039","url":"https:\/\/inter-pace.com\/en-sn\/products\/spark-exhaust-db-killer-hot-road-35mm-12-holes","provider":"Inter-Pace","version":"1.0","type":"link"}