{"product_id":"pcv-crankcase-breather-cannister-for-universal","title":"PCV Crankcase Breather Cannister For Universal","description":"Chrome. Positive Crankcase Ventilation; a universal chrome plated steel crankvent system for use on all H-D models. Fits regular 3\/8\" oil lines. The engine can breath out; but not breath in; thus maintaining vacuum in the crankcase at all RPM for improved performance.   Note: Primarily designed for bottom vent and custom head vent applications. Can not be used in regular head vent applications due to space required.  Tech tip: How active crank vents work. On the down stroke of the pistons the air in the crankcase is compressed. H-D engines; either bottom or head vent models; are not able to vent the required volume. With large displacement engines this problem increases even more. All crank vents let the pressure escape; but also partially allow it to return when the pistons go up. In an active crank vent (crankcase breather) a valve closes; preventing gasses to re-enter the crankcase; creating a stronger partial vacuum inside the crankcase. This can increase horsepower; depending on the engine. Less problems will occur with blown or weeping gaskets and piston compression rings will seal better.\u003cp\u003eUniversal\u003c\/p\u003e","brand":"MCS","offers":[{"title":"Default Title","offer_id":56158091706747,"sku":"510784","price":50.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0648\/6881\/0972\/files\/510784k.jpg?v=1773748440","url":"https:\/\/motosuperstore.co.uk\/products\/pcv-crankcase-breather-cannister-for-universal","provider":"Moto Superstore","version":"1.0","type":"link"}