Kelford Cams Extreme Valve Spring Kit - B58 / S58
Ships from the brand or distributor, usually in 3–7 business days
Make sure this fits your car
Fits: BMW M140i (F20), M240i (F22), 340i (F30), 440i (F32), 540i (G30), 740i (G11), X3/X4 M40i (G01/G02, 2018–2019), M340i (G20), M440i (G22), M240i (G42), Z4 M40i (G29), 540i (G30, 2020+), 740i (G11, 2020+), X3/X4 M40i (2020+); Toyota GR Supra 3.0 (A90/A91); BMW S58: M3 (G80/G81), M4 (G82/G83), M2 (G87), X3 M (F97), X4 M (F98). Confirm your exact car with us before ordering.
- Free US shipping over $250
- 30-day returns on unused parts
- Fitment help before you buy
High Energy, Extreme Racing Valve Springs designed for BMW B58 / S58 3.0L inline 6 Engine. High performance, progressively wound PACALOY beehive valve spring with titanium retainers.\n\nThis kit utilises a precision machined spring seat to max out the seat pressure for high boost, high horsepower builds. Specifically designed for Kelford Cams Stage 2 & Stage 3 Camshafts for engines making over 1000HP.\n\n105lb seat pressure at 35mm installed height.\n210lb at 10.8mm valve lift.\nSpring coil bind height at 23.6mm.
Fits: BMW M140i (F20), M240i (F22), 340i (F30), 440i (F32), 540i (G30), 740i (G11), X3/X4 M40i (G01/G02, 2018–2019), M340i (G20), M440i (G22), M240i (G42), Z4 M40i (G29), 540i (G30, 2020+), 740i (G11, 2020+), X3/X4 M40i (2020+); Toyota GR Supra 3.0 (A90/A91); BMW S58: M3 (G80/G81), M4 (G82/G83), M2 (G87), X3 M (F97), X4 M (F98). Confirm your exact car with us before ordering.
Brand: Kelford Cams · Part #: KVS58-BTX
BMW M140i (F20), M240i (F22), 340i (F30), 440i (F32), 540i (G30), 740i (G11), X3/X4 M40i (G01/G02, 2018–2019), M340i (G20), M440i (G22), M240i (G42), Z4 M40i (G29), 540i (G30, 2020+), 740i (G11, 2020+), X3/X4 M40i (2020+); Toyota GR Supra 3.0 (A90/A91); BMW S58: M3 (G80/G81), M4 (G82/G83), M2 (G87), X3 M (F97), X4 M (F98). Confirm your exact car with us before ordering.
| 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
MMX Billet Oil Filter Housing for BMW B58
MMX Performance Replacement Oil Filter for BMW B58 & B57 Engines
Eventuri Toyota A90 Supra B58 Black Carbon Engine Cover
