Wilwood Rear Dynalite Parking Brake Kit for GM G-Body Flange, Black, 12.19-Inch Plain Rotors, 2.62-Inch Offset

This Wilwood Dynalite rear brake kit pairs black 4-piston calipers with 12.19-inch plain face brake rotors for GM G-Body Flange. The package must match the documented mounting arrangement and wheel clearance before the original brakes are removed. Wilwood Engineering was founded by Bill Wood in 1977 and is based in Camarillo, California. Its disc-brake systems and components serve motorsport, street-performance and specialized applications. The range includes calipers, brake rotors, master cylinders, valves, fittings and brake lines, selected to suit the requirements of the complete system.

Technical Details

• Manufacturer part number: 140-17121; supplied as an axle kit.
• Housing-flange requirement: G-Body flange; 2.62-inch axle offset, measured using the manufacturer worksheet.
• Parking brake: Internal shoe parking brake supplied; cables, cable hardware and adapters are separate.
• Service calipers: Forged Dynalite Internal; 4 pistons per caliper; Black Powder Coat; lug mounting; stainless pistons.
• Supplied friction pads: BP-10 compound; match operating conditions to the intended use.
• Hydraulic lines: Hydraulic flexlines and fittings are not included; select compatible lines for the complete installation.
• Machining prerequisite: Housing-flange material removal and two drilled holes required; follow the specific drawing and arrange qualified machine-shop work.
• Hardware and retained components: Mounting hardware supplied; existing wheel hubs retained; spindles, master cylinder and brake booster are not included.
• Brake rotor size: 12.19-inch outside diameter × 0.81-inch thickness; vented friction section.
• Rotor specification: Material: Iron; Type: Ultralite HP 32 & Hat; Style: Plain Face; Surface Finish: Plain.
• Hydraulic sizing: cataloged bore sizes 1.38, 1.38 inches; piston area 3.00 square inches; inlet 1/8-27 NPT.
• Wheel envelope: 15-inch minimum nominal wheel diameter; verify the entire wheel-clearance drawing, including spoke and barrel shape.
• Rotor/hat mounting-hole pattern: 5 x 4.5 in; 5 x 114.3 mm; 5 x 4.75 in; 5 x 120.65 mm; 5 x 5 in; 5 x 127 mm; cataloged hole clearances 0.52 in; 13.21 mm. These are rotor or hat drillings, not replacement wheel studs. The retained hub or axle determines the vehicle wheel pattern.

Fitment & Compatibility

A G-Body axle flange and 2.62-inch measured axle offset are the mounting prerequisites for this rear conversion. The machining shown in DS1547 includes removal of interfering flange material and drilling two holes; arrange qualified machine-shop work. The parking-brake cable connection requires separate cables, hardware and adapters. Match the axle register, stud diameter and wheel envelope to the 12.19-inch rotor package.

A VIN helps identify the original specification; measured hardware matters after a conversion. PMB Performance draws on more than 20 years of experience when reviewing those details.

Review Installation instructions, Technical bulletin for the complete installation and clearance requirements.

Manufacturer Warning

Applicable to brake pads only. WARNING: This product can expose you to chemicals including Arsenic, Cadmium, Chromium (Hexavalent compounds), Lead, Nickel, Cobalt and Antimony Trioxide which are known to the State of California to cause cancer or other reproductive harm. For more information go to www.p65warnings.ca.gov.