This is a new brake master cylinder for 1971-1972 Chevrolet & GMC 1/2 Ton Trucks with Bendix Brake System. The bore size is 1-1/8" diameter. Check against your original. Replaces GM# 3995845, 6273936
1971-1972 Chevrolet & GMC 1/2 Ton Trucks - Both 2WD & 4WD - Fits Both Manual & Vacuum.
This part fits most 1971 1972 Chevrolet Trucks; exceptions may apply. Please read the complete description to see if this part fits your specific vehicle and application.
This product can expose you to a chemical, which is known to the State of California to cause cancer or reproductive harm.
For more information go to www.P65Warnings.ca.gov