{"product_id":"spark-exhaust-stainless-tube-38mm-500mm","title":"Spark Exhaust Stainless Steel Tube Ø 38 × 1.0 mm 500 mm Universal G9007","description":"\u003cp\u003eThirty-eight millimetres. The size at which a link pipe stops being small-bore plumbing and starts carrying the whole output of a middleweight engine.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eStraight exhaust tube, AISI 304 stainless steel.\u003c\/li\u003e\n\u003cli\u003eØ 38 mm outside, 1.0 mm wall thickness.\u003c\/li\u003e\n\u003cli\u003e500 mm long.\u003c\/li\u003e\n\u003cli\u003eFabrication stock.\u003c\/li\u003e\n\u003cli\u003eSpark part number G9007, made in Mantova, Italy.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eThe Middleweight Size\u003c\/h2\u003e\u003cp\u003eThirty-eight is a common header diameter on parallel twins between 650 and 900 cc, and a frequent link size behind a collector on a middleweight four. It is also the internal bore of the Grid-O db killer that Spark supplies with its MT-07 and XSR700 systems, which is a fair indication of the gas volume it is sized for.\u003c\/p\u003e\u003ch2\u003eMeasuring Before You Buy\u003c\/h2\u003e\u003cp\u003eExhaust tube is specified by outside diameter, and the number stamped on an original part is often the inside. Thirty-eight outside with a one millimetre wall gives thirty-six inside — so a system described as thirty-six is very likely this tube.\u003c\/p\u003e\u003cp\u003eMeasure across the outside with a vernier and compare that figure, not a nominal one from a workshop manual.\u003c\/p\u003e\u003ch2\u003eSleeving a Joint\u003c\/h2\u003e\u003cp\u003eTo slip one 38 mm tube into another you need an intermediate: a short piece of the next size up, expanded or as-supplied depending on the fit, welded to one end. Spark's own systems use slip joints throughout, held by springs, and they come apart for maintenance because of it.\u003c\/p\u003e\u003cp\u003eTwo butt-welded tubes never come apart again. That is worth thinking about before the torch comes out.\u003c\/p\u003e\u003ch2\u003eSupport, Not Suspension\u003c\/h2\u003e\u003cp\u003eA half-metre run of thin-wall stainless weighs almost nothing and will still crack at a weld if it is hung from one point. Two mounts, at least one of them rubber-isolated, is the rule that keeps a fabricated system alive through a season.\u003c\/p\u003e\u003ch2\u003eWhere the Silencer Goes\u003c\/h2\u003e\u003cp\u003eThirty-eight is a link diameter rather than a silencer inlet. Spark's universal cases take sixty; getting from one to the other means either a cone — article SGMA14 makes the 60 to 40 step — or a stepped transition of your own. Plan that part of the run before cutting the straight sections.\u003c\/p\u003e\u003ch2\u003eHalf a Metre\u003c\/h2\u003e\u003cp\u003eSpark supplies one length per article. On most builds two or three lengths of the same diameter is the realistic order — cutting, mitring and getting a bend wrong all consume material.\u003c\/p\u003e","brand":"Spark Exhaust","offers":[{"title":"Default Title","offer_id":53617859002634,"sku":"G9007","price":89.0,"currency_code":"MYR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/628620db69799_548834fc-fca2-4a8a-98be-b7f070d35c09.png?v=1788362691","url":"https:\/\/inter-pace.com\/en-my\/products\/spark-exhaust-stainless-tube-38mm-500mm","provider":"Inter-Pace","version":"1.0","type":"link"}