Free Shipping on Orders $700+ (Continental 48)

Large Bore Bolt-In Wheel Cylinders For GM Drum Brakes


Sold as a pair

Increases stopping power of stock drum brakes significantly and noticeably

Direct replacement for any ~1.367″ bore backing plate that uses bolt-in wheel cylinder

Known fitment includes but is not limited to:

>1964-1967 A-Body
>1968-1972 A-Body
>1973-1977 A-Body
>1977-1996 B-Body*
>1970-1981 F-Body
>1993-1997 F-Body
>1968-1974 X-Body
>1992-2002 S-10

Note: The oversize vs. stock brake force gain percentage depends on the original size of the wheel cylinders equipped on the vehicle as the vehicles listed above came with a variety of sizes

* Note: Please be sure verify the bore of your backing plate ~1.485″ is also a common GM backing plate hole dimension. Full size B-Body cars used both depending on options


Weight 5 lbs
Dimensions 6 × 6 × 6 in


There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.

Product Enquiry