{"product_id":"wilwood-120-18193","title":"Wilwood Left Aero4-ST Forged Four-Piston Caliper for a 1.25-Inch-Wide Rotor","description":"\u003cp\u003eThis left-hand Aero4-ST supplies the staggered-bore four-piston arrangement in an anodized forged aluminum caliper. It is an individual component for a matched brake conversion or service application, with a nominal 1.25-inch rotor width. The stated 3.56-square-inch piston area should be considered when comparing hydraulic requirements with another caliper. Wilwood Engineering was founded by Bill Wood in 1977 and is based in Camarillo, California. The company makes disc brake systems and components for motorsport, street-performance and specialized uses, including calipers, brake rotors, master cylinders, valves, fittings and brake lines; each component must match the requirements of the complete brake system.\u003c\/p\u003e\u003ch3\u003eTechnical Details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eManufacturer part number: 120-18193\u003c\/li\u003e\n\u003cli\u003eCaliper type: Aero4 Radial Mount\u003c\/li\u003e\n\u003cli\u003eConstruction: Forged Aluminium\u003c\/li\u003e\n\u003cli\u003eFinish: Type III Anodize\u003c\/li\u003e\n\u003cli\u003ePiston bores: 1.62 \/ 1.38 inches\u003c\/li\u003e\n\u003cli\u003ePiston type: Thermlock\u003c\/li\u003e\n\u003cli\u003ePiston count: 4\u003c\/li\u003e\n\u003cli\u003ePublished piston area: 3.56 square inches\u003c\/li\u003e\n\u003cli\u003eDust boots: No\u003c\/li\u003e\n\u003cli\u003eNominal rotor width: 1.25 inch\u003c\/li\u003e\n\u003cli\u003eRotor thickness limits: 1.10–1.28 inches\u003c\/li\u003e\n\u003cli\u003eRotor diameter limits: 12.19–15.00 inches\u003c\/li\u003e\n\u003cli\u003eMounting style: Radial\u003c\/li\u003e\n\u003cli\u003eMounting side: Left Hand\u003c\/li\u003e\n\u003cli\u003eMounting centers: 7.09 inches\u003c\/li\u003e\n\u003cli\u003eMounting-hole size: 0.45 inch\u003c\/li\u003e\n\u003cli\u003eMount height: 2.09 inch\u003c\/li\u003e\n\u003cli\u003eHydraulic inlet thread: 1\/8-27 NPT\u003c\/li\u003e\n\u003cli\u003eRequired pad shape: 6617\u003c\/li\u003e\n\u003cli\u003ePublished pad area: 11.1 square inches\u003c\/li\u003e\n\u003cli\u003ePublished pad volume: 5.2 cubic inches\u003c\/li\u003e\n\u003cli\u003eManufacturer-listed component weight: 7.1 lb\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment \u0026amp; Compatibility\u003c\/h3\u003e\u003cp\u003eUse the mounting drawing to establish pad position and lateral alignment on the left-hand installation. A large enough wheel diameter alone cannot confirm spoke clearance. Inspect the 7.09-inch radial mount, 0.45-inch mounting holes and inlet fitting location, and verify that both rotor diameter and thickness lie within this exact version’s limits.\u003c\/p\u003e\u003cp\u003ePMB Performance brings over 20 years of brake and parts experience to selection questions. Send the existing caliper reference and brake-package details for help checking compatibility.\u003c\/p\u003e","brand":"Wilwood","offers":[{"title":"Default Title","offer_id":67764645462194,"sku":"120-18193","price":744.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0521\/8792\/2610\/files\/120-13297-xl_5ae4848a-5ea9-46d1-bc87-cf78868feb64.jpg?v=1792514521","url":"https:\/\/pmbperformance.com\/products\/wilwood-120-18193","provider":"PMB Performance","version":"1.0","type":"link"}