ProRam Stock Box B58 Air Filter
Ships from Dallas in 1–2 business days
Make sure this fits your car
Fits: Gen 1 B58, and Gen 2 B58TU in the A90/A91 Supra and G20 M340i (factory airbox). Choose your engine.
- Free US shipping over $250
- 30-day returns on unused parts
- Run on our own builds
This is a drop-in performance filter that replaces the paper filter in your factory airbox. There's no cutting, and the airbox stays stock. You get more airflow for a few dollars, with a filter you can wash and reuse for the life of the car.
Features
- Media: high-flow synthetic nanofiber, pleated for more surface area.
- Fit: precision-molded to fit the factory airbox.
- Lifetime: washable and reusable.
- Maker: made by Ramair, with 35+ years of motorsport filtration.
Why it's worth it
It's an easy first upgrade for a stock-airbox car, and pairs with a silicone inlet pipe. It keeps the factory look, but filters better and flows more than paper.
Low stock. Check availability before ordering.
Gen 1 B58, and Gen 2 B58TU in the A90/A91 Supra and G20 M340i (factory airbox). Choose your engine.
| 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.
- Orders ship from Dallas, TX in 1–2 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
Save 50%B58 Silicone Inlet Pipe (Intake Resonator Delete)
Save 50%3.5" Red RamAir Foam Style Intake
BMS Billet Intake (F-Series B58)
