Brakes and Traction Control: Specifications
FRONT BRAKE ROTORSWith LS4
Rotor Discard Thickness * 28.6 mm (1.126 in)
Rotor Maximum Allowable Lateral Runout 0.06 mm (0.002 in)
Rotor Maximum Allowable Thickness Variation 0.025 mm (0.001 in)
Rotor Minimum Allowable Thickness After Refinishing 28.72 mm (1.31 in)
Rotor Thickness - New 30.0 mm (1.181 in)
Without LS4
Rotor Discard Thickness * 30.7 mm (1.21 in)
Rotor Maximum Allowable Lateral Runout 0.06 mm (0.002 in)
Rotor Maximum Allowable Thickness Variation 0.025 mm (0.001 in)
Rotor Minimum Allowable Thickness After Refinishing 31.0 mm (1.22 in)
Rotor Thickness - New 32.2 mm (1.27 in)
REAR BRAKE ROTORS
With LS4
Rotor Discard Thickness * 9.0 mm (0.354 in)
Rotor Maximum Allowable Assembled Lateral Runout 0.06 mm (0.002 in)
Rotor Maximum Allowable Thickness Variation 0.025 mm (0.001 in)
Rotor Minimum Allowable Thickness After Refinishing 9.35 mm (0368 in)
Rotor Thickness - New 11.0 mm (0.433 in)
Without LS4
Rotor Discard Thickness * 12.5 mm (0.49 in)
Rotor Maximum Allowable Lateral Runout 0.06 mm (0.002 in)
Rotor Maximum Allowable Thickness Variation 0.025 mm (0.001 in)
Rotor Minimum Allowable Thickness After Refinishing 12.9 mm (0.51 in)
Rotor Thickness - New 14.0 mm (0.55 in)
* All brake rotors have a discard dimension cast into them. Replace any rotor that does not meet this specification. After refinishing the rotor, replace any rotor that does not meet the minimum thickness specification.