{"product_id":"shin-yea-performance-intake-manifold-4-valve-cygnus-for-scooters-mopeds","title":"Shin Yea Performance Intake Manifold - 4 Valve Cygnus for Scooters \u0026 Mopeds","description":"\u003ch2\u003eShin Yea Performance Intake Manifold for GY6 Engines\u003c\/h2\u003e\u003cp\u003eThis Shin Yea performance intake manifold is built for GY6 engines that use Cygnus-style four-valve heads, covering QMJ and QMI 152\/157 models. It suits both fuel delivery setups, so tuners and hobbyists can use it in more than one build. It is one of the \u003ca href=\"\/collections\/scooter-cylinder-heads\"\u003escooter cylinder heads \u0026amp; valves\u003c\/a\u003e options aimed at improving engine output through better airflow. A head gasket comes in the box so you have what you need to complete the install.\u003c\/p\u003e\u003ch3\u003eBuild Material and Fit Details\u003c\/h3\u003e\u003cp\u003eThe manifold is die-cast aluminum, giving it a sturdy path for air to reach the engine. A red silicone boot on the carburetor end is held in place by two stainless hose clamps for a snug seal. A dual-hole mounting flange secures the piece to the engine.\u003c\/p\u003e\u003ch3\u003eFitting Notes\u003c\/h3\u003e\u003cp\u003eThis manifold is made only for Cygnus-style four-valve heads and will not work with standard GY6 cylinder heads. Most installations will also call for an intake spacer. A vacuum port with a plug and brass fitting is included, and it is needed for carbureted setups.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBolt hole spacing:\u003c\/strong\u003e 50mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCarb-side bore (ID):\u003c\/strong\u003e 35mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine-side bore (ID):\u003c\/strong\u003e 32mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVacuum points:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCarb compatibility:\u003c\/strong\u003e CVK 24–30mm, PWK up to 30mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e head gasket, vacuum plug with brass fitting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in:\u003c\/strong\u003e Taiwan\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e GY6-based engines with Cygnus-style 4-valve heads (QMJ\/QMI 152\/157)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits:\u003c\/p\u003e\u003cul\u003e\u003cli\u003eGY6 QMJ\/QMI 152\/157 engine with Cygnus-style 4V head (not standard GY6 heads)\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eHow to choose:\u003c\/strong\u003e Confirm your head is the Cygnus-style 4-valve design, since this manifold will not fit standard GY6 heads. Most builds will also need a separate intake spacer.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShop more:\u003c\/strong\u003e \u003ca href=\"\/collections\/scooter-cylinder-heads\"\u003eScooter Cylinder Heads \u0026amp; Valves\u003c\/a\u003e · \u003ca href=\"\/collections\/scooter-fuel-system\"\u003eScooter Fuel System Parts\u003c\/a\u003e · \u003ca href=\"\/collections\/scooter-parts\"\u003eScooter Parts\u003c\/a\u003e\u003c\/p\u003e","brand":"Trend Times Toy Stores","offers":[{"title":"Default Title","offer_id":51135742279737,"sku":"TT-16409","price":105.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/3358\/9049\/files\/shin-yea-performance-intake-manifold-4-valve-cygnus-1.jpg?v=1794349666","url":"https:\/\/www.trendtimes.com\/products\/shin-yea-performance-intake-manifold-4-valve-cygnus-for-scooters-mopeds","provider":"Trend Times Toy Stores","version":"1.0","type":"link"}