JEGS 555-630110 GM 10 & 12 Bolt Rear Axle Disc Brake Conversion Kit with cross-drilled and slotted rotors and e-brake is an easy bolt-on solution for upgrading your GM rear-end to disc brake performance. This kit is designed for GM rear axles with coil springs and shocks that mount on the backside of the axle housing.

JEGS 555-630110 Rear Disc Brake Conversion Kit Notes:

• Will NOT Fit These Applications: Axle Flange is too large to fit into the hat of the rotor. See above dimensions before ordering.
  • 1964-1965 LeMans, Tempest & GTO
  • 1964-1972 Skylark & GS
  • 1970-1974 LeMans, Tempest, GTO, Cutlass & 442
• Maximum Axle Flange Face Diameter of 6.11 in. with 2.786 in. Maximum Hub Register to fit Rotor Hat. 
• 0.050 in. x 45-degree Chamfer 

How To Measure Rear Axle Hub Flange & Register Dimensions

• For Applications with Both Shocks Behind the Rear Axle Housing
• The installation of disc brakes will require the use of 15 in. wheels. Any attempt to install disc brakes with 14 in. wheels will be the customer’s responsibility
• Does Not Fit S-10 Chassis, Truck Frames
• This kit Requires a disc/disc proportioning valve. JEGS recommends 555-63025.
• JEGS recommends a 1.125 in. large bore master cylinder like 555-631403 when adding disc brakes. 

JEGS 555-630110 Rear Disc Brake Conversion Kit Includes:

• (1 Set) Loaded Red Powder Coated Calipers Left/Driver Side and Right/Passenger Side w/Self Adjusting E-Brake, D54 Pads, and Mounting Hardware
• (2) Hubless 10 Hole Cross-Drilled & Slotted 11 in. Rotors (Dual lug pattern 5 x 4.500 in. and 5 x 4.750 in.)
• (2) 10 mm Stainless Steel Brake Hoses
• (2) 10 mm Banjo Bolts
• (4) 10 mm Copper Washers
• (6) 3/8-24 x 50 Bolts
• (6) 3/8-24 Lock Nuts
• (6) 20 x 10.5 x 2 Washers
• (2) Brake Hose Clips
• (1 box) Left Driver Side & Right Passenger Side Caliper Brackets
• (6) Shims
• (2) Brake Hose Mounting Tabs
• (2) Square Backing Plates/Axle Flanges

FAQ

Are disc brake conversion kits worth it?

• Absolutely! Upgrading to disc brakes enhances stopping power and overall safety. The JEGS 630110 conversion kit is a reliable choice for improved braking performance.

Do you need a new master cylinder for a disc brake conversion?

• Yes, it's recommended to pair the disc brake conversion with a suitable master cylinder. The JEGS 630110 kit ensures compatibility and optimal functionality.

What year did GM start using disc brakes?

• GM started incorporating disc brakes in various models around the mid-1960s. The JEGS 630110 is designed to fit GM applications, providing a reliable disc brake conversion solution.