[Chrysler300] 300 Disc Brake Conversion Update
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[Chrysler300] 300 Disc Brake Conversion Update

Hi to all,

We have successfully installed Wilwood Disc Brake upgrades on my 300-F Convertible.

The following are the disc brake upgrades now available for our 300s:

AAJ Brakes SS Brakes Magnum Force/Wilwood Magnum Force/Wilwood
Front Name/Number Front Brake Kit A154-4 Z-140-14227
Caliper 1 Piston 4 Piston 4 Piston
Rotor 11" 11 1/4" X .08" 11 3/4" X 1 1/4"
Rotor Slotted & Drilled? No Yes Yes
Wheel Size 14" Wheel 14" Wheel 14" Wheel
Rear Name/Number Rear Brake Kit A155-2 140-11386-D 140-10767-D
Caliper 1 Piston 1 Piston 4 Piston 4 Piston
Rotor 11" 10.5" X .93" 11" X 0.81" 12.9" X 0.81"
Parking Brake No Yes Yes Yes
Rotor Slotted & Drilled? No Yes Yes Yes
Wheel Size 14" Wheel 14" Wheel 14" Wheel 15" Wheel

Since my car has 15” wheels that accept 14” standard hubcaps we were able to use the larger rear kit with 12.9” rotors (140-10767-D). For 14” wheels there is a smaller kit with 11” rotors (140-11386-D).

For 1962 and earlier 8 3/4” rears, the bolt pattern of the backing plate must be redrilled to match. 1963 and later 8 3/4” rear flanges with flattened top fit the bolt pattern supplied.

Wilwood requires new green bearings to be pressed on to the rear axles. They supply clips to secure the bearings.

Both Wilwood rear kits have emergency brakes. If you still have the e-brake on the end of the tranny, you do not have to use the Wilwood set-up. If you want to upgrade, you can connect to them. Requires Lokar front universal kit with special order longer cable and Willwood rear e-brake cable kit.
The e-brake has brake linings that engage the inside of the rotor hat.

Front Wilwood kits require Wilwood front brake lines with banjo fittings.

Will be writing up a tech article with photos in the near future. Will post the link.

Tony Rinaldi


Posted by: Tony Rinaldi <awrdoc@xxxxxxxxx>

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