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obp Integral Master Cylinder - 0.75

<h2>Brake and Clutch Master Cylinders — 0.625″, 0.7″, 0.75″, 0.812″, 0.875″ and 1-inch Bore Sizes</h2><p>The 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.</p><p>The 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.</p><h2>Integral Master Cylinders Key Features</h2><ul><li>Lightweight at just 350g</li><li>Vertical Mounting Flange for easy installation</li><li>3/8”-24 UNF Outlet for reliable connections</li><li>Standard 84mm Push Rod Length</li><li>M8 Bolt Hole Size for universal mounting</li></ul><h2>Choosing the Right Master Cylinder Bore Size</h2><p>When selecting the proper master cylinder size for automotive and motorsport applications, a general rule of thumb is:</p><ul><li><strong>0.625-inch Bore</strong> for front brakes</li><li><strong>0.700-inch Bore</strong> for rear brakes</li><li><strong>0.750-inch Bore</strong> for the clutch</li><li><strong>0.812″, 0.875-inch or 1-inch</strong></li></ul><p>However, this may vary depending on the size of your brake calipers because some calipers require more brake fluid for optimal performance.</p><ul><li>Inlet Fitting: 7/16-inch-20 UNF</li><li>Outlet Fitting: 3/8-inch-24 UNF</li><li>Push Rod Thread: 5/16-inch</li><li>Pushrod Length: 84mm</li><li>Bolt Hole Spacing: 1/4-inch</li></ul><p>To 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.</p><h2>Why Choose obp Motorsport?</h2><p>When 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.</p><p>Whether 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.</p><figure class="table"><table><tbody><tr><td><strong>Bore Size</strong></td><td><strong>Part Number</strong></td><td><strong>Piston Stroke</strong></td><td><strong>Max Flow</strong></td></tr><tr><td><strong>0.625”</strong></td><td>OBPMC01</td><td>34.3 mm</td><td>6.78 ml</td></tr><tr><td><strong>0.700”</strong></td><td>OBPMC02</td><td>34.3 mm</td><td>8.51 ml</td></tr><tr><td><strong>0.750”</strong></td><td>OBPMC03</td><td>34.3 mm</td><td>9.77 ml</td></tr><tr><td><p><strong>0.812”</strong></p><p>&nbsp;</p><p><strong>0.875”</strong></p></td><td><p>OBPMC004</p><p>&nbsp;</p><p>OBPMC005</p></td><td><p>34.7 mm</p><p>&nbsp;</p><p>34.7 mm</p></td><td><p>13.44 ml</p><p>&nbsp;</p><p>13.44 ml</p></td></tr><tr><td><strong>1”</strong></td><td>OBPMC007</td><td>34.7 mm</td><td>17.57 ml</td></tr></tbody></table></figure>

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