A2-307 Girodisc Toyota GR Supra, BMW 345mm Rear Rotors

Price: $1,150.00

These Girodisc A2-307 2-piece rear rotors directly replace the 345 mm rear rotor package on Toyota GR Supra 3.0 and select BMW G-chassis models. Floating construction reduces rotating mass and improves cooling while maintaining OE parking brake and ABS. Replacement rings: D2-307.

Vehicle Fitment

• Toyota GR Supra 3.0 (A90/A91) – Rear
• BMW G20/G21 M340i – Rear
• BMW G22/G23 M440i – Rear
• BMW G20/G22 with optional M Sport brakes – Rear
• BMW G01 X3 M40i & G02 X4 M40i – Rear
• BMW G29 Z4 M40i – Rear

Applies to vehicles equipped with the 345 mm rear rotor package.

Curved-Vane Cooling

High-carbon iron rings with 48 curved vanes act as a centrifugal pump to move air through the disc. Reusable hats and spring-preloaded floating hardware allow thermal expansion without rattle for street use.

Features

• Direct OE replacement; no modifications required
• 2-piece floating construction reduces unsprung/rotational mass
• High-carbon iron rings; reusable 6061-T6 aluminum hats
• 48-vane internal geometry for airflow and cooling
• Manufactured and assembled in Bellingham, WA
• Sold/priced per pair

A2-307 FAQs

Minimum service thickness? Replace rear rings at 22 mm or sooner if a crack reaches the edge.

Parking brake and shields? Retained — dimensions keep OE parking brake function and shield clearances.

Which rings fit later? D2-307 rear replacement rings.

Related Products

• D2-307 Girodisc Toyota GR Supra, BMW 345mm Rear Replacement Rings
• A1-307 Girodisc Toyota GR Supra, BMW 348mm Front Rotors
• D1-307 Girodisc Toyota GR Supra, BMW 348mm Front Replacement Rings