{"product_id":"dynamite-friction-631-31117l-disc-brake-rotor","title":"Dynamite Friction 631-31117L Disc Brake Rotor - Rear Left","description":"\u003ch2\u003eOverview of Dynamite Friction DFC Brake Rotor\u003c\/h2\u003e\u003cp\u003eThe Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Silver (part number 631-31117L) is engineered for BMW models including the 320i xDrive, 328i, 330i, 428i, and X1. This vented disc brake rotor features a directional, slotted and drilled surface designed to enhance braking performance and heat dissipation.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDisc Type: Vented disc brake rotor with drilled and slotted surface\u003c\/li\u003e\n\u003cli\u003eFinish: Plain disc finish with zinc silver hat finish and rust-resistant coating\u003c\/li\u003e\n\u003cli\u003eDimensions: 300 mm outside diameter, 66.3 mm overall height\u003c\/li\u003e\n\u003cli\u003eThickness: Nominal thickness 20 mm, discard thickness 18.4 mm\u003c\/li\u003e\n\u003cli\u003eBolt Pattern: 5 bolt holes with 16.8 mm diameter, 120 mm bolt circle diameter\u003c\/li\u003e\n\u003cli\u003eCenter Hole Diameter: 75.05 mm\u003c\/li\u003e\n\u003cli\u003eDirectional brake surface for optimized performance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetails on the DFC Brake Rotor - Drilled and Slotted - Silver Line\u003c\/h2\u003e\u003cp\u003eThe DFC Brake Rotor - Drilled and Slotted - Silver line by Dynamite Friction focuses on rotors that combine drilled holes and slots to improve brake pad bite and reduce heat buildup. The zinc silver hat finish provides corrosion resistance, extending rotor life. This product line is designed to meet the demands of BMW vehicles requiring reliable vented rotors with enhanced cooling and rust protection.\u003c\/p\u003e\u003ch2\u003eProduct Description and Specifications\u003c\/h2\u003e\u003cp\u003eThis disc brake rotor is specifically designed for select BMW models such as the 320i xDrive, 328i xDrive, 330i GT xDrive, 428i Gran Coupe, and X1. The rotor’s vented design allows air to flow between the rotor surfaces, improving heat dissipation during braking. The drilled and slotted surface helps to evacuate gases and debris, maintaining consistent brake pad contact and reducing brake fade. The rotor features a plain disc finish paired with a zinc silver hat finish that includes a rust-resistant coating to protect against corrosion. With a nominal thickness of 20 mm and a discard thickness of 18.4 mm, this rotor meets OEM specifications for durability and performance. The 5-bolt hole pattern with a 120 mm bolt circle diameter ensures proper fitment on compatible BMW models.\u003c\/p\u003e\u003ch2\u003eCommon Applications and Problem Solving\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eReplacement for worn or warped rotors on BMW 320i xDrive and 328i models\u003c\/li\u003e\n\u003cli\u003eImproves braking performance on BMW 330i and 428i Gran Coupe vehicles\u003c\/li\u003e\n\u003cli\u003eReduces brake fade caused by overheating during aggressive driving\u003c\/li\u003e\n\u003cli\u003ePrevents rust and corrosion on rotors exposed to moisture and road salt\u003c\/li\u003e\n\u003cli\u003eRestores proper brake rotor thickness and surface condition for safe stopping\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEnsure rotor thickness is above discard thickness of 18.4 mm before installation\u003c\/li\u003e\n\u003cli\u003eClean rotor surface and hub mounting area to prevent uneven wear or vibration\u003c\/li\u003e\n\u003cli\u003eTorque lug nuts to manufacturer specifications for BMW 5-lug bolt pattern (120 mm bolt circle)\u003c\/li\u003e\n\u003cli\u003eCheck compatibility with specific BMW model and year before installation\u003c\/li\u003e\n\u003cli\u003eReplace brake pads when installing new rotors for optimal braking performance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDynamite Friction manufactures the 631-31117L rotor to meet or exceed OEM standards for fit, form, and function. The rust-resistant coating and zinc silver hat finish contribute to long-term durability. While specific warranty details are not provided, Dynamite Friction products typically come with a limited warranty against manufacturing defects. Always verify warranty terms with the product documentation or supplier.\u003c\/p\u003e","brand":"Dynamite Friction","offers":[{"title":"Default Title","offer_id":43389621698741,"sku":"HBHR-631-31117L","price":79.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DF_63131117L_Fro.jpg?v=1774634399","url":"https:\/\/www.partcatalog.com\/products\/dynamite-friction-631-31117l-disc-brake-rotor","provider":"PartCatalog","version":"1.0","type":"link"}