{"product_id":"spark-exhaust-bent-tube-45-degrees-28mm","title":"Spark Exhaust Bent Tube 45° Ø 28 × 1.5 mm Stainless Steel Universal G9118","description":"\u003cp\u003eForty-five degrees at twenty-eight millimetres. The smallest sharp corner in Spark's range, in the only small diameter it builds with a heavy wall.\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 28 mm outside, 1.5 mm wall thickness.\u003c\/li\u003e\n\u003cli\u003eStraight tangents at both ends for cutting and welding.\u003c\/li\u003e\n\u003cli\u003eMatches Spark's 28 mm straight tube, article G9010.\u003c\/li\u003e\n\u003cli\u003eSpark part number G9118, made in Mantova, Italy.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eForty-Five Is the Working Angle\u003c\/h2\u003e\u003cp\u003eOf the three angles Spark stocks, forty-five is the one most systems are actually built from. It turns a corner properly without the flow penalty of a right angle, and two of them make a ninety with an offset built in — which is what most real routing problems need.\u003c\/p\u003e\u003cp\u003eA shallow bend corrects. A right angle turns. Forty-five does both, which is why a fabricator's rack holds more of them than anything else.\u003c\/p\u003e\u003ch2\u003eSmall Bore, Tight Spaces\u003c\/h2\u003e\u003cp\u003eTwenty-eight millimetres exists for the plumbing around the main gas path: balance pipes between headers, drain and breather runs, link sections on a 125 or a small single. Those are all jobs done in confined space, where a sharper angle is what fits.\u003c\/p\u003e\u003ch2\u003eWhy the Wall Is Heavier Here\u003c\/h2\u003e\u003cp\u003eA tube's resistance to collapsing under a bender falls away rapidly as diameter drops. At twenty-eight millimetres a one millimetre wall crushes on the inner heel; a millimetre and a half survives it.\u003c\/p\u003e\u003cp\u003eThat extra half millimetre is also why this is the one small article in the range that shrugs off being stood on in a workshop.\u003c\/p\u003e\u003ch2\u003eTwo Bends, One Right Angle\u003c\/h2\u003e\u003cp\u003eWeld two 45° bends together with a short straight between them and you have a ninety degree turn that is also offset sideways. Vary the length of the straight and the offset changes with it.\u003c\/p\u003e\u003cp\u003eIt flows better than a single tight ninety and it fits around obstacles a single bend cannot dodge. The cost is one extra joint.\u003c\/p\u003e\u003ch2\u003eCutting to a Smaller Angle\u003c\/h2\u003e\u003cp\u003eA 45° bend trims down to anything shallower. Cut through the curve rather than the tangent and both halves stay usable — on a build needing several small corrections that is two parts from one article.\u003c\/p\u003e\u003ch2\u003eDeburring a Small Bore\u003c\/h2\u003e\u003cp\u003eAt twenty-eight millimetres a burr left on the inside edge occupies a meaningful fraction of the bore. A round file reaches it; a rolled-up strip of abrasive on a rod finishes it. Check with a fingernail before welding, because afterwards you cannot.\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":53618170691850,"sku":"G9118","price":70.0,"currency_code":"BBD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/6087b7f3713ef_4f013161-5f20-4c37-852b-921eb5cb812d.png?v=1788347941","url":"https:\/\/inter-pace.com\/en-bb\/products\/spark-exhaust-bent-tube-45-degrees-28mm","provider":"Inter-Pace","version":"1.0","type":"link"}