{"product_id":"spark-exhaust-bent-tube-30-degrees-32mm","title":"Spark Exhaust Bent Tube 30° Ø 32 × 1.0 mm Stainless Steel Universal G9126","description":"\u003cp\u003eA thirty degree elbow at thirty-two millimetres. The gentlest angle Spark bends, in the first of its thin-wall diameters.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMandrel-formed 30° bend, AISI 304 stainless steel.\u003c\/li\u003e\n\u003cli\u003eØ 32 mm outside, 1.0 mm wall thickness.\u003c\/li\u003e\n\u003cli\u003eStraight sections at both ends for cutting and joining.\u003c\/li\u003e\n\u003cli\u003eMatches Spark's 32 mm straight tube, article G9006.\u003c\/li\u003e\n\u003cli\u003eSpark part number G9126, made in Mantova, Italy.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhere a Shallow Bend Earns Its Place\u003c\/h2\u003e\u003cp\u003eOn a small single or twin the exhaust has to leave the head, clear the frame and arrive at a silencer mount, and the geometry is rarely a right angle. Thirty degrees is the increment that gets a run leaning the right way without a sharp change of direction the gas has to fight.\u003c\/p\u003e\u003cp\u003eTwo of them in series make sixty. Three make a right angle in three easy steps rather than one hard one, and a gas column notices the difference.\u003c\/p\u003e\u003ch2\u003eSpringback\u003c\/h2\u003e\u003cp\u003eStainless does not stay where it is bent. Released from a bender it springs back by four to eight degrees, so a thirty degree finished bend has to be pulled to something closer to thirty-six.\u003c\/p\u003e\u003cp\u003eA factory bend has already accounted for that. It arrives at thirty degrees measured, which is more than can be said for most first attempts at home.\u003c\/p\u003e\u003ch2\u003eThirty-Two Millimetres\u003c\/h2\u003e\u003cp\u003eA common header diameter on machines between 250 and 400 cc, and a sensible link size where the standard system used something similar. It is small enough to keep gas speed up on a modest engine and large enough not to choke it.\u003c\/p\u003e\u003ch2\u003eTangent Length\u003c\/h2\u003e\u003cp\u003eEvery bend arrives with a short straight section at each end. That straight is what you clamp, cut and weld against — welding on the curve is possible and is much harder to keep square.\u003c\/p\u003e\u003cp\u003ePlan the cuts so the straight ends survive. It is the most common thing to get wrong when a bend is trimmed to fit.\u003c\/p\u003e\u003ch2\u003eFlow Through a Shallow Bend\u003c\/h2\u003e\u003cp\u003eEvery change of direction costs pressure, and the cost rises steeply with angle. A thirty degree bend at a generous radius is close to free; a ninety at the same radius is not. Where a run can be built from shallow bends rather than sharp ones, it should be — the parts cost the same and the engine notices the difference at part throttle.\u003c\/p\u003e\u003ch2\u003eOrdering\u003c\/h2\u003e\u003cp\u003eOne bend per article. Spark builds this diameter in 30°, 45° and 90°.\u003c\/p\u003e","brand":"Spark Exhaust","offers":[{"title":"Default Title","offer_id":53618094670090,"sku":"G9126","price":26.89,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/6087cc870dafd_2837455e-d7f1-4e7a-97fa-9937431db56c.png?v=1788347412","url":"https:\/\/inter-pace.com\/en-za\/products\/spark-exhaust-bent-tube-30-degrees-32mm","provider":"Inter-Pace","version":"1.0","type":"link"}