{"product_id":"spark-exhaust-conic-adapter-tube-60-40mm","title":"Spark Exhaust Conic Adapter Tube Ø 60 to Ø 40 mm 110 mm Universal SGMA14","description":"\u003cp\u003eA hundred and ten millimetres of stainless cone that takes sixty millimetres down to forty. Seventeen euro instead of a fabricated transition.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eConic adapter tube, stainless steel.\u003c\/li\u003e\n\u003cli\u003eØ 60 mm at one end, Ø 40 mm at the other.\u003c\/li\u003e\n\u003cli\u003e110 mm long.\u003c\/li\u003e\n\u003cli\u003eJoins Spark's most common silencer inlet diameter to its most common link-pipe diameter.\u003c\/li\u003e\n\u003cli\u003eSpark part number SGMA14, made in Mantova, Italy.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eThe Two Numbers It Bridges\u003c\/h2\u003e\u003cp\u003eSixty is the inlet of Spark's universal Force Evo, Konix Evo, Grid-O and Megaphone silencers. Forty is the diameter most link pipes and mid-sections are built at.\u003c\/p\u003e\u003cp\u003eBetween those two sits this cone. It is the single most likely transition a Spark-based custom build will need, which is why Spark makes it as a part rather than leaving it to the fabricator.\u003c\/p\u003e\u003ch2\u003eWhy a Cone and Not a Step\u003c\/h2\u003e\u003cp\u003eA sudden change of diameter is a pressure step: gas that has been travelling at one velocity meets a different section and part of the energy reflects back up the pipe. A gradual taper does the same job without the reflection.\u003c\/p\u003e\u003cp\u003eA hundred and ten millimetres over a twenty millimetre change is a shallow taper by any standard. That is the point.\u003c\/p\u003e\u003ch2\u003eMaking the Transition Yourself\u003c\/h2\u003e\u003cp\u003eThe alternative is a rolled cone, which means a flat pattern, a set of rolls, a lengthwise weld and a great deal of fettling to make both ends round. It is a genuine sheet-metal job and it takes longer than the rest of the system.\u003c\/p\u003e\u003cp\u003eAt seventeen euro, this article is not a compromise.\u003c\/p\u003e\u003ch2\u003eWelding It In\u003c\/h2\u003e\u003cp\u003eBoth ends are plain tube ends, so both can be butt-welded or sleeved. Tack in four places, check the alignment down the bore before running a bead, and remember that the cone will pull the assembly out of line if the tacks are uneven.\u003c\/p\u003e\u003ch2\u003eLength Matters Here\u003c\/h2\u003e\u003cp\u003eA hundred and ten millimetres is not a lot of space to lose in a tight build, and the cone cannot be shortened without changing the diameters at its ends. Measure the run before ordering: if there is no room for a full-length transition, a stepped joint made from two tube sizes is the fallback.\u003c\/p\u003e\u003ch2\u003eDirection\u003c\/h2\u003e\u003cp\u003eIt works either way round as a piece of metal, but gas flows better through a diffusing cone than through a contracting one. On a normal build the 40 mm end faces the engine and the 60 faces the silencer.\u003c\/p\u003e","brand":"Spark Exhaust","offers":[{"title":"Default Title","offer_id":53617862869258,"sku":"SGMA14","price":23800.0,"currency_code":"NGN","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/5efca569f211a_2f983e5f-132a-444c-b82e-71a1997306d1.png?v=1788354187","url":"https:\/\/inter-pace.com\/en-ng\/products\/spark-exhaust-conic-adapter-tube-60-40mm","provider":"Inter-Pace","version":"1.0","type":"link"}