{"product_id":"girodisc-gird1-242-front-replacement-rings-c8-corvette-z51","title":"GiroDisc 2020+ Chevrolet Corvette Z51 (C8) Slotted Front Rings","description":"\u003ch4\u003eUS-Made Replacement Iron Rotor Rings for 2020+ Corvette C8 Z51 GiroDisc 2-Piece Front Rotor Systems\u003c\/h4\u003e\u003cp\u003eThe GiroDisc GIRD1-242 is a set of slotted front replacement disc rings designed for the 2020+ Chevrolet Corvette C8 with the Z51 performance package. These rings are the iron disc half of GiroDisc's 2-piece fully floating front rotor system, poured from GiroDisc's proprietary cast iron and machined entirely in-house in the USA. The GIRD1-242 allows C8 Z51 owners who already have a GiroDisc hat to replace only the worn iron rings rather than purchasing a full 2-piece rotor assembly, significantly reducing the cost of ownership over time. The slotted design improves bite, pad outgassing, and rotor face cleaning during aggressive braking.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eReplacement front rotor rings for 2020+ Corvette C8 with Z51 package\u003c\/li\u003e\n\u003cli\u003eCompatible with GiroDisc D1-242\/A1-242 2-piece front rotor hat assemblies\u003c\/li\u003e\n\u003cli\u003eProprietary cast iron formulation poured and machined entirely in the USA by GiroDisc\u003c\/li\u003e\n\u003cli\u003eSlotted disc design improves brake bite, outgassing, and pad face wiping under hard braking\u003c\/li\u003e\n\u003cli\u003eFully floating design eliminates heat-induced distortion and pedal pulsation\u003c\/li\u003e\n\u003cli\u003eSignificant cost savings over full A1-242 rotor assembly replacement\u003c\/li\u003e\n\u003cli\u003eSold per pair (both front rings included)\u003c\/li\u003e\n\u003cli\u003eDesigned and manufactured in-house at GiroDisc\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFitment\u003c\/h4\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eYear Range\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eTrim\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2020-2025\u003c\/td\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eCorvette C8\u003c\/td\u003e\n\u003ctd\u003eStingray Z51\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2020-2025\u003c\/td\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eCorvette C8\u003c\/td\u003e\n\u003ctd\u003e3LT Z51\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003eGIRD1-242\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eGiroDisc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePosition\u003c\/td\u003e\n\u003ctd\u003eFront\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRing Type\u003c\/td\u003e\n\u003ctd\u003eReplacement rings (iron disc only)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisc Material\u003c\/td\u003e\n\u003ctd\u003eProprietary cast iron (USA-sourced and machined)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlot Style\u003c\/td\u003e\n\u003ctd\u003eSlotted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eGiroDisc A1-242 \/ D1-242 hat assembly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003ePair (2 rings)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Manufacture\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch4\u003eWhat's Included\u003c\/h4\u003e\u003cul\u003e\u003cli\u003e2x GiroDisc GIRD1-242 front replacement rotor rings\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eAbout GiroDisc\u003c\/h4\u003e\u003cp\u003eGiroDisc designs and manufactures 2-piece fully floating brake rotors from their US facility. Every rotor disc and ring is produced in-house from US-sourced materials, from raw iron poured in their own foundry to final CNC machining and assembly. Their replacement ring program allows owners to extend the life of their aluminum hat investment by replacing only the wear surface, reducing long-term brake system costs compared to conventional one-piece rotors.\u003c\/p\u003e\u003ch4\u003eFrequently Asked Questions\u003c\/h4\u003e\u003cstrong\u003eDo I need to purchase new hats when ordering GIRD1-242 replacement rings?\u003c\/strong\u003e\u003cp\u003eNo. The GIRD1-242 rings are designed to replace only the worn iron disc rings in your existing GiroDisc A1-242 2-piece front rotor assembly. Your aluminum hat and drive pins are reused, making this a cost-effective replacement option compared to buying a full A1-242 kit.\u003c\/p\u003e\u003cstrong\u003eWhat years does the GIRD1-242 fit the Corvette C8 Z51?\u003c\/strong\u003e\u003cp\u003eThe GIRD1-242 fits the 2020 and newer Chevrolet Corvette C8 equipped with the Z51 performance package. Confirm your C8 is optioned with Z51 before ordering, as the standard non-Z51 C8 uses a smaller front rotor configuration.\u003c\/p\u003e\u003cstrong\u003eCan I use the GIRD1-242 rings with aftermarket calipers on the C8?\u003c\/strong\u003e\u003cp\u003eThe GIRD1-242 rings are sized for the factory C8 Z51 front caliper position. Compatibility with aftermarket calipers depends on the caliper bracket offset and rotor dimension requirements of the specific caliper kit. Consult your caliper manufacturer before ordering for an aftermarket caliper application.\u003c\/p\u003e\u003cstrong\u003eHow do I know when the GIRD1-242 rings need to be replaced?\u003c\/strong\u003e\u003cp\u003eGiroDisc rings should be replaced when the disc surface reaches the minimum thickness specification stamped on the rotor, when heavy surface cracking is present beyond normal heat checking, or when the pad contact surface is deeply scored. Replace rings in pairs (both front) to maintain balanced brake bias.\u003c\/p\u003e\u003cstrong\u003eAre GiroDisc GIRD1-242 replacement rings street legal?\u003c\/strong\u003e\u003cp\u003eYes. GiroDisc slotted rotors are street legal and fully compliant for road use. They are quiet and vibration-free during normal street driving, and the slotted surface improves performance without creating the noise issues associated with drilled rotors.\u003c\/p\u003e\u003cstrong\u003eDo I need a brake bedding procedure after installing GIRD1-242 rings?\u003c\/strong\u003e\u003cp\u003eYes. New rings require a proper bedding procedure to transfer pad material evenly to the rotor surface. Perform 8-10 moderate stops from 60 mph to 10 mph without coming to a complete stop, allow cooling, then follow with 3-4 more aggressive stops. This ensures consistent bite and prevents pad glaze.\u003c\/p\u003e\u003cstrong\u003eHow does the GIRD1-242 compare to a full A1-242 GiroDisc kit?\u003c\/strong\u003e\u003cp\u003eThe GIRD1-242 replacement rings provide the same iron disc surface and slotted design as the rings in the full A1-242 kit. The only difference is that the GIRD1-242 does not include the aluminum hat. If your hat is in serviceable condition, the rings deliver identical braking performance at significantly lower cost.\u003c\/p\u003e\u003cstrong\u003eWhat brake pads are recommended with the GIRD1-242 on a track-driven C8 Z51?\u003c\/strong\u003e\u003cp\u003eFor track use, high-temperature compounds from Hawk (DTC-60 or DTC-70), EBC (RP-X or Yellowstuff), or Pagid (RS19, RS29) are commonly used on C8 Z51 builds. Match the pad temperature range to the expected brake temperatures for your track and driving style. Always verify pad compound compatibility with your existing brake fluid specification.\u003c\/p\u003e\u003ch4\u003eInstallation Overview\u003c\/h4\u003e\u003col\u003e\n\u003cli\u003eSafely lift and support the vehicle, remove front wheels\u003c\/li\u003e\n\u003cli\u003eRemove front brake calipers and caliper brackets, suspend with wire\u003c\/li\u003e\n\u003cli\u003eRemove the existing worn GiroDisc iron rings from the aluminum hat assembly\u003c\/li\u003e\n\u003cli\u003eClean all hat contact surfaces and drive pin locations\u003c\/li\u003e\n\u003cli\u003eInstall the GIRD1-242 replacement rings onto the existing hat, verify drive pin engagement\u003c\/li\u003e\n\u003cli\u003eReinstall caliper bracket and caliper, torque to factory specification\u003c\/li\u003e\n\u003cli\u003eReinstall wheels, lower vehicle\u003c\/li\u003e\n\u003cli\u003ePerform GiroDisc bedding procedure before any aggressive driving\u003c\/li\u003e\n\u003c\/ol\u003e\u003cp\u003e\u003cstrong\u003eWARNING:\u003c\/strong\u003e This product can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov.\u003c\/p\u003e","brand":"GiroDisc","offers":[{"title":"Default Title","offer_id":46033623384143,"sku":"GIRD1-242","price":745.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/GiroDisc_Front_Rings_2020-2025_C8_Corvette_Z51.jpg?v=1783619719","url":"https:\/\/www.blackopsautoworks.com\/products\/girodisc-gird1-242-front-replacement-rings-c8-corvette-z51","provider":"Black Ops Auto Works","version":"1.0","type":"link"}