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The Wilwood Forged Superlite I4‑ST caliper uses differential bore pistons to reduce pad taper wear and, in ST models, Thermlock pistons to block heat transfer and lower caliper, fluid, and seal temperatures by up to 25% versus standard stainless pistons. Built for sustained hard braking, these calipers are suited to dirt and asphalt oval racing, off‑road, rally, and road‑course applications where thermal control and consistent pad wear matter.
Wilwood Caliper-Forged Superlite I4-ST 1.88/1.75in Pistons .81in Disc
