Spool ZF 8HP Billet Main Shaft (8HP45/50/51 or 8HP70/75/76)
Ships from the brand or distributor, usually in 3–7 business days
Make sure this fits your car
Fits: BMW B58 and S58 (and Toyota GR Supra 3.0) with the ZF 8HP50, 8HP51 or 8HP76 automatic
- Free US shipping over $250
- 30-day returns on unused parts
- Fitment help before you buy
SPOOL 8HP45 / 8HP50 / 8HP51 & 8HP70 / 8HP75 / 8HP76 Billet Main Shaft We spent 3 years developing this shaft to build something we genuinely felt was missing from the 8HP market — a true billet main shaft made for serious power. This shaft is CNC machined from billet 300M steel , giving us the strength and consistency we were looking for from the start. We put a huge amount of attention into the machining and quality control, especially where it matters most. The splines are machined to extremely tight tolerances and are checked carefully to make sure everything fits and engages properly. The shaft is also nitrided for surface hardening , giving it a hard, wear-resistant surface while maintaining the strength of the 300M material underneath. This wasn't an overnight project. We spent three years testing, refining, machining, and going back to the drawing board to get it right.
Fits: BMW B58 and S58 (and Toyota GR Supra 3.0) with the ZF 8HP50, 8HP51 or 8HP76 automatic
Brand: Spool Performance
BMW B58 and S58 (and Toyota GR Supra 3.0) with the ZF 8HP50, 8HP51 or 8HP76 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) | |
| M3 | G80/G81 | 2021+ | S58 (BMW M) | |
| M4 | G82/G83 | 2021+ | S58 (BMW M) | |
| M2 | G87 | 2023+ | S58 (BMW M) | |
| X3 M | F97 | 2020–2024 | S58 (BMW M) | |
| X4 M | F98 | 2020–2025 | S58 (BMW M) |
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 B58/S58 Billet Race Torque Converter (No Core Required)
Spool ZF 8HP45/50/51 Billet 300M C-Hub Cog Drive
Clutch Masters Lightweight Steel Flywheel (6-Speed) - GR Supra 3.0 / BMW B58
