Spool ZF 8HP45/50/51 Billet 300M C-Hub Cog Drive
Ships from the brand or distributor, usually in 3–7 business days
Make sure this fits your car
Fits: BMW B58 and Toyota GR Supra 3.0 with the ZF 8HP45, 8HP50 or 8HP51 automatic
- Free US shipping over $250
- 30-day returns on unused parts
- Fitment help before you buy
Spool Performance ZF 8HP45 / 8HP50 / 8HP51 Billet 300M C-Hub Cog Drive The factory C-hub cog drive in ZF 8HP45, 8HP50, and 8HP51 transmissions is produced from cast steel. While adequate at stock power levels, casting brings inherent weaknesses—porosity, uneven grain structure, and localized stress points—that are exposed as torque output, line pressure, and shift aggression increase. Common failure modes include cog tooth deformation, spline wear, and cracking under shock load . Spool Performance replaces the factory casting with a fully CNC-machined billet 300M C-Hub Cog Drive , engineered specifically for high-torque and high-RPM applications. 300M is an ultra-high-strength, vacuum-melted alloy steel used in aerospace and motorsports driveline components.
Fits: BMW B58 and Toyota GR Supra 3.0 with the ZF 8HP45, 8HP50 or 8HP51 automatic
Brand: Spool Performance
BMW B58 and Toyota GR Supra 3.0 with the ZF 8HP45, 8HP50 or 8HP51 automatic
| Model | Chassis | Years | Engine | Fits |
|---|---|---|---|---|
| M140i | F20/F21 | 2016–2019 | Gen 1 B58 | |
| M240i | F22/F23 | 2016–2021 | Gen 1 B58 | |
| 340i | F30/F31/F34 | 2016–2019 | Gen 1 B58 | |
| 440i | F32/F33/F36 | 2017–2020 | Gen 1 B58 | |
| 540i | G30/G31 | 2017–2019 | Gen 1 B58 | |
| 740i | G11/G12 | 2016–2019 | Gen 1 B58 | |
| X3 M40i | G01 | 2018–2019 | Gen 1 B58 | |
| M340i | G20/G21 | 2019+ | Gen 2 B58 (TU) | |
| M440i | G22/G23/G26 | 2021+ | Gen 2 B58 (TU) | |
| M240i | G42 | 2022+ | Gen 2 B58 (TU) | |
| Z4 M40i | G29 | 2019+ | Gen 2 B58 (TU) | |
| GR Supra 3.0 | A90/A91 | 2020+ | Gen 2 B58 (TU) | |
| 540i | G30/G31 | 2020–2023 | Gen 2 B58 (TU) | |
| 740i | G11/G12 | 2020–2022 | Gen 2 B58 (TU) | |
| X3 M40i | G01 | 2020+ | Gen 2 B58 (TU) |
Not sure? Email sales@b58racing.com with your VIN.
- Ships from the brand or distributor, usually in 3–7 business days.
- Free US shipping on orders over $250.
- Unused parts can be returned within 30 days. Some items are marked no-refund in their description.
Full details are on our shipping and returns page.
Pairs well with
Spool ZF 8HP Billet Main Shaft (8HP45/50/51 or 8HP70/75/76)
Spool B58/S58 Billet Race Torque Converter (No Core Required)
Spool ZF 8HP45/50/51 Billet 7075-T6 D Clutch Drum
