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The Wilwood ST Aero4 caliper listed here uses the 1.88/1.62 piston sizing and is paired with a 1.25" rotor specification. It presents a specific caliper-to-rotor sizing combination for buyers verifying component fit. The overview highlights physical dimensions and piston arrangement to aid selection where caliper geometry and rotor thickness must match vehicle mounting and braking requirements.
Wilwood ST AERO4 Caliper 1.88/1.62 1.25 Rotor
