Larger 1.34" bore master cylinder to compensate for rear disc brake conversions and front caliper upgrades on 88-00 CK1500 trucks, where increased brake piston sizes result in a low/soft pedal feel.
Includes Master Cylinder and Adapter Fitting to connect to factory lines of CK trucks. Bench bleed kit also included.
NOTE: Stock hardlines will need slight readjustment to align with new master cylinder ports. Fits vacuum booster ONLY, NOT hydroboost.
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