Wilwood - GM Metric D154-R Caliper

Wilwood – GM Metric D154-R Single Piston Race Caliper

The Wilwood GM Metric D154-R Caliper is Wilwood’s latest race-engineered upgrade to the popular GM metric brake platform. Built around a forged aluminum body with a Type III hard-anodized finish and a stainless steel piston, the D154-R delivers lower deflection, higher volumetric efficiency, and reduced weight compared to traditional cast-iron metric calipers.

Available with 2.00" or 2.50" piston options, the D154-R supports rotor thicknesses from 0.810" to 1.04" and rotor diameters up to 12.19". The centered fluid inlet port, located directly behind the piston, eliminates interference with slide pins for improved installation and serviceability.

Weighing just 3.3 lbs, this caliper uses standard GM metric D154 brake pads and mounts using stock height and offset. The caliper is universal left or right, simplifying inventory and installation.

Features & Benefits

• Forged aluminum construction – Lightweight with reduced deflection
• Type III hard-anodized finish – Wear and corrosion resistance
• Stainless steel piston – Reliable under race heat
• Lower deflection rate – Firmer, more consistent pedal feel
• High volumetric efficiency – Improved braking response
• Centered fluid inlet – Eliminates slide-pin interference
• Universal L/R design – Simplified installation

Fitment & Specifications

• Caliper Type: Single piston
• Mounting Bolt Pattern: 5.46" GM Metric
• Pad Style: D154 (Standard GM Metric)
• Piston Sizes Available: 2.00" or 2.50"
• Rotor Thickness Range: 0.810" – 1.04"
• Maximum Rotor Diameter: 12.19"
• Fluid Inlet: 1/8" NPT
• Weight: 3.3 lbs
• Orientation: Universal left or right