Kelsey Hayes Style Rear Brake Master Cylinder with 5/8in. Bore - Chrome. Fits FX 1980-1983, FXWG 1980-1982 & Sportster 1980-1981. VF-78233 * Increased air flow for

* Increased air flow for more power

which are among the highest in the industry

* Includes Relief Valve Spring

* Matching Idle Cable # MS-44258

* Integrated Polycarbonate Filter Top with Embossed Vance & Hines Logo

Kelsey Hayes Style Rear Brake Master Cylinder with 5/8in. Bore - Chrome. Fits FX 1980-1983, FXWG 1980-1982 & Sportster 1980-1981. VF-78233 * Increased air flow forUSA MADE! * 5 8" bore for multi piston caliper * Use 26248 3 4" bore for OEM single piston caliper * Rebuild kit BDL GMA MRCB1 Brake Line Options: 1. Brake olive can be removed from the existing master cylinder & refitted to new master cylinder which then requires 3 8" UNF flare nut fitting PAI 284 and re use the factory brake line 2. Use 10mm banjo bolt PAI 109, 10mm banjo & universal brake line