{"product_id":"big-13-16-inch-clutch-master-cylinder","title":"Big 13\/16 Inch Clutch Master Cylinder","description":"The Nismo Big Operating Cylinder (Part Number 30620-RS520) is an upgraded clutch slave cylinder engineered to enhance clutch engagement and refine shifting performance. It offers a larger internal diameter of 13\/16 inch (20.54mm) compared to the stock 3\/4 inch (19.055mm) unit, which can lead to a lighter clutch feel and improved operability, especially beneficial for daily driving in traffic or when paired with more aggressive clutch setups.\n\nInstallation of this Nismo slave cylinder is similar to the OEM component, but it requires careful attention to procedure. It is crucial to prevent air from entering the system during removal of the standard cylinder by securely clamping the hose. The new cylinder should be filled with brake fluid and bled properly before connecting. Even with careful installation, some air may remain in the system, particularly in wider diameter hoses, which can affect pedal feel and stroke. Utilizing a vacuum bleeding method and the provided U-pipe eliminator adapter (if included with a Nismo Clutch Hose) is recommended to ensure complete air removal.\n\nA copper seal washer (Genuine Nissan part 46237-A4600) is required for installation. Due to the decreased cylinder stroke volume with the larger bore, users may need to adjust their clutch stroke as necessary. This component is specifically designed for a range of Nissan S-chassis vehicles including the 180SX (KRS13, RPS13), Silvia (KS13, PS13, S14, S15), and compatible with CA18DET, SR20DET, and KA24DE\/E engines across various model years from approximately 1988 to 2002.","brand":"Nismo Big","offers":[{"title":"Default Title","offer_id":52663116333368,"sku":"30620-RS520","price":85.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687515582.jpg?v=1784323964","url":"https:\/\/store.motormia.co\/products\/big-13-16-inch-clutch-master-cylinder","provider":"MOTORMIA","version":"1.0","type":"link"}