Wilwood 120-11873 Forged Billet Disc Brake Caliper - D154 Dual Piston GM Metric

The Wilwood D154 forged billet aluminum caliper is a direct bolt-on, high-strength, extreme-duty upgrade over the factory cast iron calipers originally fitted to a wide range of GM disc brake-equipped mid-size cars and small trucks beginning in 1978. This same caliper design remained in use on select GM platforms through 2002, and its widespread availability made it a go-to choice for restricted-class competition builds and drum-to-disc brake conversion projects on hot rods and street machines.

Piston Configurations:

• Single piston: 2.50" diameter
• Dual piston: 1.62" / 1.62" diameter
• Dual piston: 1.12" / 1.12" diameter

Key Features:

• Forged billet aluminum construction — delivers significant weight savings and superior strength compared to OE cast iron calipers
• Stainless steel pistons — resist corrosion and retard heat transfer from the brake pads into the caliper body
• High-temperature square-faced bore seals — provide controlled piston retraction and reliable performance through a wider sealing face
• Vibration dampening rings on slide pin holes minimize brake noise
• Dual bleed screws (one on each end) allow mounting in any position — left-hand or right-hand, front leading mount, or rear trailing mount
• Compatible with a wide range of D154-spec brake pad compounds

The Wilwood D154 caliper is a proven performer across all driving environments, from daily street use to extreme sustained high-temperature racing applications. Its combination of corrosion-resistant hardware, advanced sealing technology, and flexible mounting design delivers long service life and consistent stopping power.