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Product details
The Wilwood AFX cast-steel ProSpindle pair provides a 2-inch front drop and dedicated mounting for compatible Wilwood brake kits. The spindle removes the factory sliding-caliper mount and incorporates strengthened steering arms for the supported GM chassis. Wilwood Engineering was founded by Bill Wood in 1977 and is based in Camarillo, California. Its disc-brake systems and components include calipers, brake rotors, master cylinders, valves, fittings and brake lines for motorsport, street-performance and specialized applications, with each component selected for the complete brake system.
Technical Details
- Manufacturer part number: 831-15958
- Material: Cast Steel
- Finish: Black E-Coat
- Position: Front left and right pair
- Drop: 2.00 inches
- Brake requirement: Matching Wilwood AFX second-generation brake kit
- Ball-joint arrangement: Applicable OE-style ball joints
- Application groups: Specified GM A/F/X/B-body chassis; see model and original-brake requirements below
- Listed assembly weight: 32.000 lb
Fitment & Compatibility
FL508 lists 1970–1981 F-body, 1973–1976 A-body, specified X-body models and selected 1977–1990 B-body vehicles originally fitted with 11-inch rotors. Model-specific exceptions apply, including the Omega entry. Check the exact model/year in the linked flyer, OE ball joints and the selected Wilwood brake-kit clearance drawing.
Manufacturer Documents
PMB Performance brings over 20 years of experience with brake components and fitment. Send us the installed kit number and relevant measurements if you need help confirming this part.
