{"product_id":"spark-exhaust-spring-83mm","title":"Spark Exhaust Exhaust Spring 83 mm Without Rubber Universal MOLLA01","description":"\u003cp\u003eEighty-three millimetres of exhaust spring, bare. The longer of Spark's two lengths, and the part that holds a slip joint together on almost every system it builds.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eExhaust spring, 83 mm.\u003c\/li\u003e\n\u003cli\u003eSupplied without a rubber sleeve.\u003c\/li\u003e\n\u003cli\u003eSpark part number MOLLA01, made in Mantova, Italy.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhy a Spring and Not a Clamp\u003c\/h2\u003e\u003cp\u003eAn exhaust grows several millimetres between cold and working temperature. A rigid clamp fights that movement and puts it into the welds; a spring lets the joint slide and pulls it closed again.\u003c\/p\u003e\u003cp\u003eThat is why Spark uses sprung slip joints throughout its own systems, and why a fabricated exhaust built the same way outlives one welded solid.\u003c\/p\u003e\u003ch2\u003eWhich Length\u003c\/h2\u003e\u003cp\u003eEighty-three millimetres suits the longer span — a joint where the two hooks sit further apart, typically on larger-diameter pipework. Spark's shorter spring, MOLLA02, is 63 mm for tighter positions.\u003c\/p\u003e\u003cp\u003eMeasure between hook centres with the joint assembled and pick the spring that will be under tension rather than stretched to its limit.\u003c\/p\u003e\u003ch2\u003eTwo Per Joint\u003c\/h2\u003e\u003cp\u003eFitted at opposing sides. One spring lets the joint rock; three is no better than two and makes the assembly harder to separate. Two, opposite each other, is what Spark does.\u003c\/p\u003e\u003ch2\u003eBare or Sleeved\u003c\/h2\u003e\u003cp\u003eThis version comes without rubber. The sleeved equivalent, MOLLA06, costs a euro more and stops the spring ringing against the pipe at idle — worth having on a road machine and irrelevant on a track bike.\u003c\/p\u003e","brand":"Spark Exhaust","offers":[{"title":"Default Title","offer_id":53618350096650,"sku":"MOLLA01","price":2.94,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/698b5f8114452_8c60c5a8-075e-413f-946b-91ac2c415b56.png?v=1788354391","url":"https:\/\/inter-pace.com\/en-gb\/products\/spark-exhaust-spring-83mm","provider":"Inter-Pace","version":"1.0","type":"link"}