{"product_id":"wilwood-170-8878","title":"Wilwood Front GM 2500 Hat with Eight-Hole Flange and 12 x 10.75-Inch Rotor Circle","description":"\u003cp\u003eWilwood's GM 2500 front hat uses a 12 x 10.75-inch rotor circle. Check the 1.550-inch offset, 4.64-inch register and eight-hole hub flange. Bill Wood’s 1977 founding of Wilwood Engineering began a disc brake design and manufacturing business based in Camarillo, California. The range includes master cylinders, calipers, rotors, brake lines, valves and fittings for motorsport, street-performance and specialized vehicles. Component selection must consider the complete braking arrangement.\u003c\/p\u003e\u003ch3\u003eTechnical Details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 170-8878\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComponent:\u003c\/strong\u003e Truck Brake Rotor Hat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurface finish:\u003c\/strong\u003e Black E-Coat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRotor mounting method:\u003c\/strong\u003e Fixed Mount\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePosition in the specified brake assembly:\u003c\/strong\u003e Front\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHat offset:\u003c\/strong\u003e 1.550 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRotor attachment interface:\u003c\/strong\u003e 12 x 10.75 inches; rotor attachment, separate from the hub flange\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHub-flange mounting\/clearance pattern(s):\u003c\/strong\u003e 8 x 6.50 inches; verify the actual hub and wheel-stud clearance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCenter register diameter:\u003c\/strong\u003e 4.64 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRotor mounting hole\/thread designation:\u003c\/strong\u003e 5\/16-18\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal clearance diameter:\u003c\/strong\u003e 7.85 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting-face thickness:\u003c\/strong\u003e 0.45 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHub-side hole clearance diameter(s):\u003c\/strong\u003e 0.630 inches; these are clearance dimensions, not wheel-stud thread sizes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer-listed attachment hardware reference:\u003c\/strong\u003e 230-12176; verify the specific rotor and attachment arrangement before ordering hardware\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment \u0026amp; Compatibility\u003c\/h3\u003e\u003cp\u003eMatch this component to the documented GM 2500 truck brake conversions. Confirm the mounting stack, center location and rotor hardware; vehicle model alone does not establish compatibility with a modified brake system. Select the rotor and attachment hardware separately for the documented assembly. Follow the installation drawing for engagement and clearance at every mounting point.\u003c\/p\u003e\u003ch3\u003eManufacturer Reference\u003c\/h3\u003e\u003cp\u003e\u003ca href=\"https:\/\/www.wilwood.com\/Hats\/HatProd?itemno=170-8878\"\u003eWilwood component specifications and dimensions\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003eFor fitment assistance backed by more than 20 years of experience, share the installed brake configuration with PMB Performance before ordering.\u003c\/p\u003e","brand":"Wilwood","offers":[{"title":"Default Title","offer_id":67730128961714,"sku":"170-8878","price":387.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0521\/8792\/2610\/files\/Truck_Standard-xl.jpg?v=1792173140","url":"https:\/\/pmbperformance.com\/products\/wilwood-170-8878","provider":"PMB Performance","version":"1.0","type":"link"}