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GM 10/12-BOLT, 305mm C5/C6

The KORE3 305mm Rear Big-Brake Kit for the early GM 10/12-bolt passenger car rear axle application adapts high-performance, high-quality, 5th or 6th generation (C5/C6) Corvette brake components to your early GM 10/12-bolt equipped car.

There is vast aftermarket support for C5/C6 Corvette rotors and brake pads to suit nearly anybody's needs and/or budget, making the KORE3 big-brake conversion a nearly unbeatable combination for the front and rear of any muscle car, whether you're grocery getting, pro-touring, or a little bit of both.



Application Notes:

Listed in the table below are makes and models compatible with this KORE3 rear disc conversion kit from the factory. The list is accurate to the best of our knowledge at this time, but is intended for your reference only. Please refer to the notes for application specific information and contact us if you have any questions regarding compatibility.


KORE3 GM 10/12-Bolt Application Chart
Year Make Model Notes
1964-1979 Buick Gran Sport, Skylark, Sommerset Regal, Special 1, 2, 3, 4
1973-1977 Buick GNX, Grand National, Regal 1, 2, 3, 4
1962-1979 Chevrolet Chevy II, Nova 1, 2, 3, 4
1964-1977 Chevrolet Chevelle, El Camino, Laguna, Malibu 1, 2, 3, 4
1967-1981 Chevrolet Camaro 1, 2, 3, 4
1968-1977 Chevrolet Monte Carlo 1, 2, 3, 4
1991-2002 GM S-Series Truck/SUV 1, 2, 3, 4
1964-1977 Pontiac GTO, Lemans 1, 2, 3, 4
1967-1981 Pontiac Firebird, Trans Am 1, 2, 3, 4
1973-1977 Pontiac Grand Prix 1, 2, 3, 4
1967-1977 Oldsmobile 442, Cutlass 1, 2, 3, 4

  1. This kit includes the parking brake compatible brackets but none of the parking brake components.


  2. This kit is compatible with C-clip axles only.


  3. Axle flanges may need to be machined for proper rotor fitment: 5.85" OD with a .08" x 45 degree chamfer preferred. Most axle shafts will need to be modified.


  4. Minimum 17" wheels are recommended, however not all 17" wheels will fit. Verify wheel fitment prior to ordering using the appropriate KORE3 fitment template. Wheel fitment is the buyer's responsibility. Please contact us if you have any questions regarding your specific application or the proper use of the templates.


  5. Vehicles equipped with staggered shocks may require two left hand calipers for proper caliper bleeder screw placement. The brackets are ambidextrous and can be installed facing forward or rearward, inline with the pinion.


The following items are included in this kit:

  • Installation instructions


  • KORE3 Early GM 10/12-Bolt Big-Brake Bracket Kit


  • FlexKORE™ 2-piece Brake Line Kit


  • C5/C6 Rear Caliper Kit


  • C5/C6 Rear Pad Kit


  • C5/C6 Rear Rotors


Build your kit selecting from the options below. If you have any questions regarding your specific application or don't see an option you may prefer, please don't hesitate to contact us.

Price: $740.00
Quantity:
KORE3 News:

Notice: All OE GM Corvette calipers (C6, C6 Z51 and C6 Z06) are no longer in production and limited to either stock on hand, NOS, or used/remanufactured options. We currently have reproduction C6 2-piston front calipers on hand and are working on similar 1-piston rear caliper options now. Please contact us with any questions.


KORE3 is a proud dealer for Hydratech Braking Systems™, the industry leader in hydraulic brake assist conversions for the pro-touring market. Please plan for approximately 90-120 day deliveries on all hydroboost units until further notice.

Upcoming Closures:

August 19th, 2022

September 5th, 2022

September 9th, 2022

November 24-25th, 2022


KORE3 and our suppliers are experiencing unprecedented challenges with respect to supply chain issues combined with high levels of demand, so your patience and understanding is always much appreciated. We will continue to strive to provide premium level products and service noting that delivery estimates are just that, estimates.