Meets the brake performance requirements of SAE J1153 and J1154 testing, providing reliability and quality Pressure tested to ensure safe and confident braking Cast iron and aluminum specifications; no extra stress on the brake boosting mounting Geometrical tolerance ensures that the body and plastic reservoir match for a proper fit Piston assembly and return spring help to prevent brake drag, which can cause premature brake pad wear The following inspections and maintenance procedures can help prevent potential brake problems: Check brake fluid level at every oil change. Replace fluid according to owner's manual recommendations. Calipers and wheel cylinders should be checked every brake inspection and serviced or replaced as required. Inspect the brake lines for rust, punctures, or visible leaks (You may be able to do this, but consult a qualified technician if necessary). Check the thickness of your brake pads. 1. Package Dimensions: 9.4 x 5.8 x 4.8 inches 2. Package Weight: 8.37 lb 3. Package Quantity: 1 4. National Popularity Code : W 5. 4405 mm: 25.4 6. 5: New 7. 7322 mm: 12.700 8. 7451 mm: 11.112 9. Bleeder Hoses Included: Yes 10. Brake Booster Included: No 11. Master Cylinder Bore Diameter: 1 12. Master Cylinder Cap Included: Yes 13. Master Cylinder Material: Cast Iron 14. Measurements: 1 in Cylinder Bore 15. Mounting Bracket Included: No 16. Mounting Hole Quantity: 2 17. Port Quantity: 2 18. Primary Outlet Thread Diameter: 0.5 19. Pushrod Included: Yes 20. Reservoir Included: Yes 21. Secondary Outlet Thread Diameter: 0.4375 22. Vintage Part Indicator: N Q: Do I have to replace all my brake parts when replacing my brake cylinder? A: No, but it is a good idea to inspect them for wear-out, cracking, leaking etc.