{"product_id":"obp-integral-master-cylinder","title":"obp Integral Master Cylinder","description":"\u003ch2\u003eBrake and Clutch Master Cylinders — 0.625″, 0.7″, 0.75″, 0.875″ and 1-inch Bore Sizes\u003c\/h2\u003e\n\u003cp\u003eThe space-saving, integral design of the obp master cylinder is a game-changer for bulkhead-fit pedal boxes, making it perfect for installations where the cylinder sits conveniently in the engine bay. With the built-in reservoir, you eliminate the need for extra brake lines required in a remote setup, ensuring a leak-free operation and a cleaner, more efficient system.\u003c\/p\u003e\n\u003cp\u003eThe obp Master Cylinder is designed for compatibility, with a 2.25” (57mm) bolt-hole spacing that matches most standard mounting patterns in the industry. This makes it an ideal choice for a wide variety of applications, including automotive, motorsport, agriculture, hydraulic systems, and more.\u003c\/p\u003e\n\u003ch2\u003eIntegral Master Cylinders Key Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eLightweight at just 350g\u003c\/li\u003e\n\u003cli\u003eVertical Mounting Flange for easy installation\u003c\/li\u003e\n\u003cli\u003e3\/8”-24 UNF Outlet for reliable connections\u003c\/li\u003e\n\u003cli\u003eStandard 84mm Push Rod Length\u003c\/li\u003e\n\u003cli\u003eM8 Bolt Hole Size for universal mounting\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eChoosing the Right Master Cylinder Bore Size\u003c\/h2\u003e\n\u003cp\u003eWhen selecting the proper master cylinder size for automotive and motorsport applications, a general rule of thumb is:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e0.625-inch Bore\u003c\/strong\u003e for front brakes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e0.700-inch Bore\u003c\/strong\u003e for rear brakes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e0.750-inch Bore\u003c\/strong\u003e for the clutch\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e0.875-inch or 1-inch\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eHowever, this may vary depending on the size of your brake calipers because some calipers require more brake fluid for optimal performance.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInlet Fitting: 7\/16-inch-20 UNF\u003c\/li\u003e\n\u003cli\u003eOutlet Fitting: 3\/8-inch-24 UNF\u003c\/li\u003e\n\u003cli\u003ePush Rod Thread: 5\/16-inch\u003c\/li\u003e\n\u003cli\u003ePushrod Length: 84mm\u003c\/li\u003e\n\u003cli\u003eBolt Hole Spacing: 1\/4-inch\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eTo add some context, the 3\/8”-24 UNF outlet indicates that the outlet port of the master cylinder has a diameter of 3\/8 inches, with 24 threads per inch, following the UNF threading standard. This ensures a strong, leak-resistant connection, which is critical in high-pressure applications like braking systems in racing vehicles.\u003c\/p\u003e\n\u003ch2\u003eWhy Choose obp Motorsport?\u003c\/h2\u003e\n\u003cp\u003eWhen it comes to braking accessories, obp Master Cylinders have earned their reputation as one of the most sought-after options on the market. Featuring an innovative internal double-seal setup, these master cylinders are prized for their unbeatable combination of reliability, affordability, and top-tier performance.\u003c\/p\u003e\n\u003cp\u003eWhether you’re pushing the limits on the racetrack or working in demanding industrial environments, obp Master Cylinders are designed to deliver outstanding results wherever high-quality components are essential.\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBore Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePiston Stroke\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Flow\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e0.625”\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOBPMC01\u003c\/td\u003e\n\u003ctd\u003e34.3 mm\u003c\/td\u003e\n\u003ctd\u003e6.78 ml\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e0.700”\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOBPMC02\u003c\/td\u003e\n\u003ctd\u003e34.3 mm\u003c\/td\u003e\n\u003ctd\u003e8.51 ml\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e0.750”\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOBPMC03\u003c\/td\u003e\n\u003ctd\u003e34.3 mm\u003c\/td\u003e\n\u003ctd\u003e9.77 ml\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cstrong\u003e0.812”\u003c\/strong\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e0.875”\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003eOBPMC004\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eOBPMC005\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e34.7 mm\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e34.7 mm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e13.44 ml\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e13.44 ml\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e1”\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOBPMC007\u003c\/td\u003e\n\u003ctd\u003e34.7 mm\u003c\/td\u003e\n\u003ctd\u003e17.57 ml\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable class=\"cke_show_border\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eHeight (cm)\u003c\/th\u003e\n\u003ctd\u003e10.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWidth (cm)\u003c\/th\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDepth (cm)\u003c\/th\u003e\n\u003ctd\u003e21\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Size\u003c\/th\u003e\n\u003ctd\u003e0.625, 0.7, 0.75, 0.875, 1\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eH.S. Code\u003c\/th\u003e\n\u003ctd\u003e8708309190\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"obp","offers":[{"title":"0.625″","offer_id":53790570545481,"sku":"OBPMC01","price":49.99,"currency_code":"GBP","in_stock":true},{"title":"0.700″","offer_id":53790570578249,"sku":"OBPMC02","price":49.99,"currency_code":"GBP","in_stock":true},{"title":"0.750″","offer_id":53790570611017,"sku":"OBPMC03","price":49.99,"currency_code":"GBP","in_stock":true},{"title":"0.812\"","offer_id":53790570643785,"sku":"OBPMC04","price":49.99,"currency_code":"GBP","in_stock":true},{"title":"0.875″","offer_id":53790570676553,"sku":"OBPMC05","price":49.99,"currency_code":"GBP","in_stock":true},{"title":"1.000″","offer_id":53790570709321,"sku":"OBPMC07","price":49.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0974\/9463\/0729\/files\/obp-integral-master-cylindermaster-cylinderrace-rally-suppliesobpmc01-2313847.webp?v=1773298399","url":"https:\/\/rrs-store.co.uk\/products\/obp-integral-master-cylinder","provider":"Race Rally Supplies","version":"1.0","type":"link"}