Wilwood Left Red TC6R Caliper, Rear-Mount Orientation, 6.90-Square-Inch Area / 1.38-Inch-wide Rotor

Choose this left-hand Wilwood TC6R when the installation calls for 1.88/1.62/1.62-inch pistons and 1.38-inch rotor width. The red 6-piston body uses an 8.27-inch radial pattern; check its complete geometry before substituting another caliper. Bill Wood founded Wilwood Engineering in 1977. Based in Camarillo, California, Wilwood designs and manufactures disc brake systems and parts for motorsport, street-performance and specialized applications, from calipers and rotors to master cylinders, valves, fittings and brake lines.

Wilwood specifies rear mount clocking for this left-hand caliper. This is its orientation around the spindle, not a designation of the vehicle’s front or rear axle. Match the intended rotor rotation and upper bleed position.

Technical Details

• Manufacturer part number: 120-14320-RSR
• Component: Wilwood TC6R; one caliper
• Pad shape: Wilwood type 6318; compound selected separately
• Rotor width: 1.38-inch nominal; 1.32–1.38-inch permitted range
• Rotor diameter range: 14.00–16.00 inches
• Mounting: Left hand; Radial; 8.27-inch centers; 0.45-inch mounting holes
• Mount height: 2.56 inches
• Piston arrangement: 6 pistons; 1.88/1.62/1.62-inch bores; stainless steel
• Hydraulic piston area: 6.90 square inches, as specified by Wilwood
• Fluid inlet: 1/8-27 NPT
• Body and finish: Forged aluminum; Red Powder Coat
• Dust boots: No

Fitment & Compatibility

Plan the caliper installation with the rotor centered in the pad gap. Verify attachment hardware, hose connection and accessible upper bleeders, then confirm the brake system’s hydraulic balance.

This listing covers one caliper. Match the brake pads, rotor, hose and mounting arrangement to the complete brake system.

TC6R calipers use six differential-bore stainless pistons in a radial-mount body intended for heavy truck and SUV brake packages. Six bridge bolts join the body, and replaceable steel bridge plates protect the pad abutments.

PMB Performance has over 20 years of brake and parts experience. Send us the caliper specifications, rotor measurements and bracket details if you need help selecting the correct component.