{"product_id":"wilwood-120-16529","title":"Wilwood Left GN4R-ST Caliper for 1.25-Inch Rotor Width — 1.88\/1.75-Inch Bores, Anodized","description":"\u003cp\u003eThis anodized Wilwood GN4R-ST left brake caliper uses a 7.09-inch radial mount and the 1.25-inch rotor-width configuration. It is sold as one caliper, with its piston and mounting specification selected for the complete brake assembly. Grand National GN4R-ST is a forged four-piston radial caliper with Thermlock insulated pistons. Its special bracket offset and 7520 pad outline require a measured brake assembly. Use the exact nominal rotor width below rather than a general family-width assumption. Founded by Bill Wood in 1977, Wilwood Engineering is based in Camarillo, California. It designs and manufactures disc brake systems and components, including calipers, brake rotors, master cylinders, valves, fittings and brake lines, for motorsport, street-performance and specialized applications. Components must be selected to suit the complete brake system.\u003c\/p\u003e\u003ch3\u003eTechnical Details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eManufacturer part number: 120-16529\u003c\/li\u003e\n\u003cli\u003eComponent: Grand National GN4R; one individual caliper\u003c\/li\u003e\n\u003cli\u003ePlacement: Left\u003c\/li\u003e\n\u003cli\u003eConstruction and finish: Forged aluminum; Type III Anodize\u003c\/li\u003e\n\u003cli\u003eNominal rotor width: 1.25 inches\u003c\/li\u003e\n\u003cli\u003eRotor width range: 1.19–1.25 inches\u003c\/li\u003e\n\u003cli\u003eRotor diameter range: 12.19–14.00 inches\u003c\/li\u003e\n\u003cli\u003eCaliper weight reference: 8.0 lb\u003c\/li\u003e\n\u003cli\u003eMounting interface: Radial; mounting centers 7.09 inches\u003c\/li\u003e\n\u003cli\u003eMounting-hole diameter: 0.45 inches\u003c\/li\u003e\n\u003cli\u003eMount height: 2.33 inches\u003c\/li\u003e\n\u003cli\u003eHydraulic inlet thread: 1\/8-27 NPT\u003c\/li\u003e\n\u003cli\u003ePistons: 4; Thermlock insulated; bore dimensions 1.88\/1.75 inches\u003c\/li\u003e\n\u003cli\u003eHydraulic piston area: 5.18 square inches\u003c\/li\u003e\n\u003cli\u003eDust boots: No\u003c\/li\u003e\n\u003cli\u003eBrake pad shape: 7520; shape number does not specify a friction compound\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment \u0026amp; Compatibility\u003c\/h3\u003e\u003cp\u003eMatch the 7.09-inch radial attachment to the existing bracket, then check caliper centering over the 1.25-inch nominal-width rotor. Use the left-hand caliper and keep the bleed arrangement in the specified orientation. The 1\/8-27 NPT connection must use the correct fitting and seal. Check the full wheel envelope with the actual bracket and rotor installed.\u003c\/p\u003e\u003cp\u003e\u003ca href=\"https:\/\/www.wilwood.com\/Calipers\/CaliperProd?itemno=120-16529\"\u003eWilwood caliper specifications\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003eContact PMB Performance for a component comparison using the actual caliper, bracket and rotor measurements. Our team has over 20 years of experience with parts and fitment details.\u003c\/p\u003e","brand":"Wilwood","offers":[{"title":"Default Title","offer_id":67764051771570,"sku":"120-16529","price":830.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0521\/8792\/2610\/files\/120-16528-xl_ba1ed497-8e15-4dbe-a195-0dea9dd29ded.jpg?v=1792509089","url":"https:\/\/pmbperformance.com\/products\/wilwood-120-16529","provider":"PMB Performance","version":"1.0","type":"link"}