Wilwood Caliper-Forged Superlite 4R-ST-L/H - Anodized 1.25/1.25in Pistons 1.25in Disc

The Thermlock® pistons in these Wilwood Superlite 4R-ST-L/H calipers are designed to block heat transfer, helping to keep your brake fluid and seals cooler. This is a notable advantage when you're dealing with sustained high temperatures, like those found in dirt and asphalt oval racing, or demanding off-road and road course use. The calipers themselves are forged for strength and finished with a wear-resistant Type III hard anodize coating.

These calipers also use differential bore pistons, a smart design choice that accounts for uneven pad wear caused by leading-edge loading and temperature differences across the pad surface. This helps reduce taper wear, meaning your brake pads last longer and perform more consistently, especially under hard braking conditions. The 1.25-inch piston size is a common choice for balancing stopping power and pedal feel.

If you're building a braking system for serious performance driving, especially where heat management is a concern, these calipers are a solid option. They are well-built and incorporate advanced features to handle the rigors of competition and aggressive driving.