Supertech BMW Toyota B58 5 mm Intake Valve Stem Seal — part number VSI-BM50-I. The go-to B58 intake valve stem seal for performance builds, refreshes and preventative maintenance on BMW and Toyota GR Supra platforms. Engineered by Supertech to meet or exceed stringent industry standards, this 5 mm intake valve seal delivers consistent oil control and long-term reliability in both daily-driven and high-performance B58 engines.
Why choose this Supertech B58 intake valve stem seal
- Designed for the BMW and Toyota B58 engine’s 5 mm intake valve stems for an accurate, reliable seal.
- Excellent oil control to help reduce oil consumption and intake port contamination.
- Built for performance and durability across stock, tuned and track-focused B58 applications.
- Ideal when fitting upgraded valve springs, cams, or during cylinder head refreshes and rebuilds.
- Proven on our own Nforcd builds and highly rated by customers for consistent sealing and dependable performance.
Perfect for these B58 applications
Suitable for BMW and Toyota models equipped with the B58 engine, including but not limited to:
- BMW M140i
- BMW M240i
- BMW 340i and M340i
- BMW 440i and M440i
- BMW 540i
- BMW 640i
- BMW 740i
- BMW 840i
- BMW X3 M40i
- BMW X4 M40i
- BMW X5 40i
- BMW X6 40i
- BMW X7 40i
- BMW Z4 M40i
- Toyota GR Supra A90 A91 B58
If you are unsure about compatibility for your exact model or year, contact us and we will be happy to help.
What’s included
- 1 x Supertech 5 mm intake valve stem seal
Part number
VSI-BM50-I
Manufactured by
Supertech
Professional fitting
For expert installation, we recommend booking with Nforcd in Warwickshire. Request a fitting quote: Sales@nforcd.com.
Why buy from Nforcd
- Tested on our own B58 projects and trusted by our customers.
- Performance-focused guidance from enthusiasts who build and drive these cars.
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