{"product_id":"spark-exhaust-bent-tube-45-degrees-40mm","title":"Spark Exhaust Bent Tube 45° Ø 40 × 1.0 mm Stainless Steel Universal G9102","description":"\u003cp\u003eForty-five degrees at forty millimetres. If a fabricator owns one exhaust bend, statistically it is this one.\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 40 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 40 mm straight tube, article G9001.\u003c\/li\u003e\n\u003cli\u003eSpark part number G9102, made in Mantova, Italy.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eMixing With a Right Angle\u003c\/h2\u003e\u003cp\u003eA 90° bend off a collector followed by a 45 into the silencer position is the standard two-bend run, and it covers a surprising proportion of custom builds. The ninety does the hard turn where space is tightest; the forty-five aims what comes after it.\u003c\/p\u003e\u003cp\u003ePut a straight between them and two fixed angles become an adjustable geometry: lengthen it and the silencer moves back, shorten it and the whole tail tucks in.\u003c\/p\u003e\u003ch2\u003eHalving It With a Saw\u003c\/h2\u003e\u003cp\u003eForty-five is the angle worth stocking because it can be reduced. Cut it in half and you have twenty-two degrees; cut a third off and you have thirty. The reverse is not possible, which is the argument for buying the larger angle when you are unsure.\u003c\/p\u003e\u003cp\u003eTake the length out of the curve rather than off the straight tangent — the tangent is what you clamp and weld against.\u003c\/p\u003e\u003ch2\u003eWhat Goes Wrong Without a Mandrel\u003c\/h2\u003e\u003cp\u003eThe inner heel folds. A crush bender presses the tube into an angle without supporting it from inside, and at forty millimetres in one millimetre wall the material buckles rather than stretching. The result is a crease, a smaller bore exactly where the gas has to turn, and a part that cannot be dressed straight.\u003c\/p\u003e\u003ch2\u003eOvality After Forming\u003c\/h2\u003e\u003cp\u003eEven a good bend is slightly oval at the tangent point. It is rarely enough to matter for a butt weld, and often enough to matter for a tight slip fit. Two vernier readings at ninety degrees to each other take ten seconds and save a joint that will not go together.\u003c\/p\u003e\u003ch2\u003eSpares\u003c\/h2\u003e\u003cp\u003eBuy more than the drawing says. Trimming consumes the tangent, a bend clocked wrong is usually scrap, and the difference between finishing a build over a weekend and waiting a week is one spare elbow on the shelf.\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":53618175279370,"sku":"G9102","price":234.0,"currency_code":"TTD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/5c0e998e4746a_413880d1-88a3-4248-9da4-851aa089745a.png?v=1788354243","url":"https:\/\/inter-pace.com\/en-tt\/products\/spark-exhaust-bent-tube-45-degrees-40mm","provider":"Inter-Pace","version":"1.0","type":"link"}