{"product_id":"spark-exhaust-bent-tube-45-degrees-54mm","title":"Spark Exhaust Bent Tube 45° Ø 54 × 1.0 mm Stainless Steel Universal G9108","description":"\u003cp\u003eFifty-four millimetres at forty-five degrees. A collector-section diameter in the angle that does most of the turning on a large four.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMandrel-formed 45° bend, AISI 304 stainless steel.\u003c\/li\u003e\n\u003cli\u003eØ 54 mm outside, 1.0 mm wall thickness.\u003c\/li\u003e\n\u003cli\u003eStraight tangents at both ends.\u003c\/li\u003e\n\u003cli\u003eMatches Spark's 54 mm straight tube, article G9003.\u003c\/li\u003e\n\u003cli\u003eSpark part number G9108, made in Mantova, Italy.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eThe First Corner After the Merge\u003c\/h2\u003e\u003cp\u003eOn a litre-class four the collector is large, hot and close to the engine, and the pipe leaving it has to get past the swingarm pivot before it can do anything else. That first corner is the one with the least room and the most heat, and forty-five degrees is usually the sharpest turn that will fit.\u003c\/p\u003e\u003ch2\u003eHeat Near the Bend\u003c\/h2\u003e\u003cp\u003eImmediately after a collector the gas is at its hottest, and a bend there will radiate onto whatever is behind it — a shock body, a wiring loom, a coolant hose. Check what sits within fifty millimetres before the run is committed, and plan a shield rather than discovering the need after a melted connector.\u003c\/p\u003e\u003ch2\u003eGrowth Along a Hot Run\u003c\/h2\u003e\u003cp\u003eStainless expands about seventeen microns per metre per degree. The section right after the collector sees the largest temperature swing in the system, so if there is one sliding joint in the exhaust, it belongs downstream of this bend rather than upstream of it.\u003c\/p\u003e\u003ch2\u003eBracket Placement\u003c\/h2\u003e\u003cp\u003eNot on the curve. A tab welded to the outside of a bend puts a hard point on the thinnest, most stressed part of the tube. Weld to a straight section and let the bend float between two supported points.\u003c\/p\u003e\u003ch2\u003eFiller and Technique\u003c\/h2\u003e\u003cp\u003e308L for AISI 304, square cut, tight gap, clean metal. The low carbon content of 308L is what stops chromium carbide forming at the grain boundaries — the difference between a joint that lasts and one that rusts along the heat-affected zone within a season.\u003c\/p\u003e\u003ch2\u003eClocking It Right\u003c\/h2\u003e\u003cp\u003eA bend has a plane, and rotating it about the tube axis swings the far end through an arc. On a run with a collector at one end and a fixed mount at the other, that rotation is the only adjustment left — and it has to be right before the first tack, because afterwards the only correction is a saw.\u003c\/p\u003e\u003ch2\u003eOrdering\u003c\/h2\u003e\u003cp\u003eOne bend per article. Available in 30°, 45° and 90° at this diameter.\u003c\/p\u003e","brand":"Spark Exhaust","offers":[{"title":"Default Title","offer_id":53618183078154,"sku":"G9108","price":19700.0,"currency_code":"XOF","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/5c0e99a6af900_06793d1d-1e9d-4758-b092-a91910d3dfaf.png?v=1788354268","url":"https:\/\/inter-pace.com\/en-bf\/products\/spark-exhaust-bent-tube-45-degrees-54mm","provider":"Inter-Pace","version":"1.0","type":"link"}