{"product_id":"stoptech-127-34031l-disc-brake-rotor","title":"Stoptech 127.34031L Disc Brake Rotor - Front Left","description":"\u003ch2\u003eStopTech Sport Cross-Drilled \u0026amp; Slotted Disc Brake Rotors Overview\u003c\/h2\u003e\u003cp\u003eThe StopTech Sport Cross-Drilled \u0026amp; Slotted Disc Brake Rotor (Part Number 127.34031L) is engineered for BMW models including the 540i, 740i, 740iL, 850Ci, and 850i. Designed to enhance braking performance, this vented rotor features a coated hat finish and a floating disc mounting system for improved heat dissipation and durability.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCross-drilled and slotted surface for efficient heat and gas dissipation\u003c\/li\u003e\n\u003cli\u003eVented rotor design to reduce brake fade under heavy use\u003c\/li\u003e\n\u003cli\u003eCoated hat finish to resist corrosion and extend rotor life\u003c\/li\u003e\n\u003cli\u003eFloating disc mounting for better thermal expansion management\u003c\/li\u003e\n\u003cli\u003eCompatible with BMW 540i, 740i, 740iL, 850Ci, and 850i models\u003c\/li\u003e\n\u003cli\u003ePart Number: 127.34031L\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct Line Details: StopTech Sport Cross-Drilled \u0026amp; Slotted Disc Brake Rotors\u003c\/h2\u003e\u003cp\u003eThe StopTech Sport Cross-Drilled \u0026amp; Slotted Disc Brake Rotors line is designed to provide enhanced braking performance through advanced rotor surface technology. The combination of cross-drilled holes and precision slots improves pad bite and helps evacuate heat and debris, which is critical for maintaining consistent braking under demanding conditions. This product line focuses on vented rotors with coated hats to balance performance and corrosion resistance, making it suitable for both street and light track use.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications and Features\u003c\/h2\u003e\u003cp\u003eThis disc brake rotor has a nominal thickness of 30.000 mm (1.181 inches) and a discard thickness of 28.400 mm (1.118 inches), ensuring a long service life before replacement is necessary. The rotor measures 324 mm (12.756 inches) in outside diameter with an overall height of 77.1 mm (3.035 inches). It features a 5-lug pattern with a mounting bolt hole circle diameter of 120 mm (4.724 inches) and stud\/lug hole diameter of 15 mm (0.591 inches). The rotor includes two miscellaneous holes and uses a straight vane style for effective cooling. Note that this rotor does not include ABS tone rings or bearings.\u003c\/p\u003e\u003ch2\u003eApplications and Problem Solving\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eImproves braking performance on BMW 540i, 740i, 740iL, 850Ci, and 850i models\u003c\/li\u003e\n\u003cli\u003eReduces brake fade during aggressive driving or towing\u003c\/li\u003e\n\u003cli\u003eMinimizes heat buildup with vented design and cross-drilled slots\u003c\/li\u003e\n\u003cli\u003eHelps prevent brake pad glazing and uneven wear\u003c\/li\u003e\n\u003cli\u003eResists corrosion with coated hat finish for longer rotor life\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 before installation\u003c\/li\u003e\n\u003cli\u003eUse proper torque specifications for the 5-lug mounting pattern\u003c\/li\u003e\n\u003cli\u003eCheck compatibility with existing brake pads and calipers on BMW models\u003c\/li\u003e\n\u003cli\u003eInspect hub surface for cleanliness to ensure proper rotor seating\u003c\/li\u003e\n\u003cli\u003eBleed brake system after installation to maintain optimal brake feel\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eStopTech disc brake rotors are manufactured to meet or exceed OEM specifications for fit, form, and function. The coated hat finish provides corrosion resistance to extend rotor life. While specific warranty details are not provided here, StopTech products typically come with a limited warranty against defects in materials and workmanship. Always verify warranty terms with the product documentation or supplier.\u003c\/p\u003e","brand":"Stoptech","offers":[{"title":"Default Title","offer_id":44572294381749,"sku":"FLMN-127.34031L","price":186.86,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/CE_12734031L_Fro.jpg?v=1774639208","url":"https:\/\/www.partcatalog.com\/products\/stoptech-127-34031l-disc-brake-rotor","provider":"PartCatalog","version":"1.0","type":"link"}