{"product_id":"wilwood-120-13949","title":"Wilwood Grand National GN6R Caliper with Thermlock Pistons, Left Type III Anodized, 1.38-Inch-wide Rotor","description":"\u003cp\u003eChoose this left-hand Wilwood Grand National GN6R when the installation calls for 1.75\/1.38\/1.38-inch pistons and 1.38-inch rotor width. The Type III anodized 6-piston body uses a 7.09-inch radial pattern; check its complete geometry before substituting another caliper. Bill Wood founded Wilwood Engineering in 1977. Based in Camarillo, California, Wilwood designs and manufactures disc brake systems and parts for motorsport, street-performance and specialized applications, from calipers and rotors to master cylinders, valves, fittings and brake lines.\u003c\/p\u003e\u003cp\u003eThe six-piston GN6R uses radial attachment, a removable center bridge and type 7520 pads. Matching bracket kits adapt the caliper to earlier Grand National mounting layouts; the 7.09-inch radial centers are not the bracket-to-spindle spacing.\u003c\/p\u003e\u003ch2\u003eTechnical Details\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 120-13949\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComponent:\u003c\/strong\u003e Wilwood Grand National GN6R; one caliper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody and finish:\u003c\/strong\u003e Forged aluminum; Type III anodized\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDust boots:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePiston arrangement:\u003c\/strong\u003e 6 pistons; 1.75\/1.38\/1.38-inch bores; Thermlock\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHydraulic piston area:\u003c\/strong\u003e 5.40 square inches, as specified by Wilwood\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Left hand; Radial; 7.09-inch centers; 0.45-inch mounting holes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMount height:\u003c\/strong\u003e 2.33 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFluid inlet:\u003c\/strong\u003e 1\/8-27 NPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePad shape:\u003c\/strong\u003e Wilwood type 7520; compound selected separately\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRotor width:\u003c\/strong\u003e 1.38-inch nominal; 1.25–1.38-inch permitted range\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRotor diameter range:\u003c\/strong\u003e 12.19–13.06 inches\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFitment \u0026amp; Compatibility\u003c\/h2\u003e\u003cp\u003ePlan the caliper installation with the rotor centered in the pad gap. Verify attachment hardware, hose connection and accessible upper bleeders, then confirm the brake system’s hydraulic balance.\u003c\/p\u003e\u003cp\u003eThis listing covers one caliper. Match the brake pads, rotor, hose and mounting arrangement to the complete brake system.\u003c\/p\u003e\u003cp\u003ePMB Performance has over 20 years of brake and parts experience. Send us the caliper specifications, rotor measurements and bracket details if you need help selecting the correct component.\u003c\/p\u003e","brand":"Wilwood","offers":[{"title":"Default Title","offer_id":67764029849778,"sku":"120-13949","price":788.33,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0521\/8792\/2610\/files\/120-13948-xl_399d52d4-3659-40e3-8cef-7048c3068674.jpg?v=1792508832","url":"https:\/\/pmbperformance.com\/products\/wilwood-120-13949","provider":"PMB Performance","version":"1.0","type":"link"}