{"product_id":"sifton-shorty-hyper-jet-kit","title":"Sifton Shorty Hyper-Jet Kit","description":"\u003cp\u003eSifton brass carburetor hyper-jet kit increases fuel delivery and is for use on OKO and S+S 1-7\/8 inch carburetors. Includes extra jets.\n\u003cbr\u003eExternally mounted 3rd fuel feed improves the performance of 2 circuit carburetors such as the S\u0026amp;S Super. Unmodified  these carburetors typically have a low speed  or intermediate  circuit that supplies fuel from idle to approximately 2500 rpm  at which point the carburetor's main jet circuit becomes active  delivering more fuel to the engine. These 2 circuits must then supply fuel for the rest of the rpm range. The problem is: the remaining rpm range is too wide (typically 2500-6500 rpm) for only 2 circuits to handle efficiently. The tuner genearlly encounters problems jetting the carburetor to give good  crisp mid-range response and still have strong top end power. This is an additional high speed fuel circuit  delivering needed fuel to the engine at higher rpms  4500 \u0026amp; up. You can now use the main jet to tune for smooth  broad mid-range power and supplement the top end with Sifton. Jets are used to control the amount of fuel sent to the engine. \n\u003cbr\u003e Tech Notes: Requires drilling and machining for installation. Acts as a 3rd circuit when installed. \n\u003cbr\u003e Instructions: http:\/\/www.vtwinmfg.com\/Instructions\/35\/35-1719.pdf\u003c\/p\u003e","brand":"Sifton","offers":[{"title":"Default Title","offer_id":55897864077480,"sku":"35-1719","price":186.95,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0747\/8273\/6552\/files\/35-1719a.jpg?v=1787340318","url":"https:\/\/speedguyscanada.com\/products\/sifton-shorty-hyper-jet-kit","provider":"THE SPEED GUYS CANADA ","version":"1.0","type":"link"}