{"product_id":"spark-exhaust-bent-tube-90-degrees-52mm","title":"Spark Exhaust Bent Tube 90° Ø 52 × 1.0 mm Stainless Steel Universal G9152","description":"\u003cp\u003eFifty-two millimetres at ninety degrees. A right angle sized so that fifty millimetre pipe goes into either end of it — the piece that lets a large system come apart at its most awkward point.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMandrel-formed 90° bend, AISI 304 stainless steel.\u003c\/li\u003e\n\u003cli\u003eØ 52 mm outside, 1.0 mm wall thickness.\u003c\/li\u003e\n\u003cli\u003eFifty millimetre bore.\u003c\/li\u003e\n\u003cli\u003eMatches Spark's 52 mm straight tube, article G9013.\u003c\/li\u003e\n\u003cli\u003eSpark part number G9152, made in Mantova, Italy.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eThe Day the System Comes Off\u003c\/h2\u003e\u003cp\u003eA rear tyre, a chain, a shock, a wheel bearing — sooner or later the exhaust has to come off a motorcycle that is not new. A welded run has to be manoeuvred out in one piece, usually past a swingarm and around a footrest hanger. A run with a joint at the corner lifts out in two halves.\u003c\/p\u003e\u003cp\u003eOver the life of a machine that is what this article actually buys, and it is worth more than the difference in price.\u003c\/p\u003e\u003ch2\u003eFifty Inside, Fifty-Two Outside\u003c\/h2\u003e\u003cp\u003eOne millimetre of wall on each side means the bore is exactly the outside diameter of the standard size. Nothing is expanded, swaged or machined: the pipe goes in, the springs go on, and the corner is made.\u003c\/p\u003e\u003ch2\u003eSprings and Hooks\u003c\/h2\u003e\u003cp\u003eSpark sells the springs in two lengths, with or without a rubber sleeve, and hooks to fit them in stainless or titanium. Two per joint at opposing sides is the arrangement Spark uses on its own systems; three is not better, and one lets the joint rock.\u003c\/p\u003e\u003cp\u003eThe rubber sleeve is not decorative — it stops the spring ringing against the pipe at idle.\u003c\/p\u003e\u003ch2\u003eCarbon in the Gap\u003c\/h2\u003e\u003cp\u003eA slip joint that has run for a season will not simply pull apart: carbon builds in the overlap and locks it. Warming the outer part gently and twisting rather than pulling is the way; levering against a thin-wall bend distorts the socket and ruins the fit permanently.\u003c\/p\u003e\u003ch2\u003eWhere This Diameter Comes From\u003c\/h2\u003e\u003cp\u003eFifty-two exists in Spark's range because Spark's own exhausts use sprung slip joints throughout, and a slip joint needs a female half. A supplier building only to round numbers has no reason to own the tooling — which is why almost nobody else lists the size.\u003c\/p\u003e\u003ch2\u003eOrdering\u003c\/h2\u003e\u003cp\u003eOne bend per article. Spark builds 30°, 45° and 90° at this diameter.\u003c\/p\u003e","brand":"Spark Exhaust","offers":[{"title":"Default Title","offer_id":53618248941834,"sku":"G9152","price":31.93,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/6087e1a8df39d_04aa04e7-b90e-4a33-96ed-c03bdf1ead90.png?v=1788348550","url":"https:\/\/inter-pace.com\/en-om\/products\/spark-exhaust-bent-tube-90-degrees-52mm","provider":"Inter-Pace","version":"1.0","type":"link"}