This is a completely new brake master cylinder for 1955-1959 (2nd Series) Chevrolet & GMC trucks. 1-1/8" Diameter Bore. Replaces GM# 5454503 with Casting # 5454330
1955-1959 (2nd Series) 1/2. 3/4 & 1 Ton Trucks - Series 3
This part fits most 1955 1956 1957 1958 1959 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