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This Wilwood Aero4-DS caliper entry reflects a 1.38 caliper configuration matched to a 1.10" rotor size. It provides a compact caliper option for applications that require a smaller rotor diameter, helping installers confirm physical fit and piston sizing when selecting replacement or upgraded calipers for tighter clearance setups.
Wilwood 1.38 AERO4-DS Caliper 1.10 Rotor
