Supertech Sodium-Filled Exhaust Valve for BMW N55 & S55 - OE-Fit Performance Upgrade (M2 Competition, M3, M4, M135i, 335i, 435i, 535i) | BMEVI-1055S-HS

Supertech Sodium Cooled Exhaust Valve for BMW N55B30 and S55B30 - a direct replacement, OE-size valve that improves thermal control, reliability and consistency in turbocharged straight-six engines. Ideal for engine refreshes, rebuilds and performance builds on F-series BMW models including F87 M2 Competition, F80 M3, F82 F83 M4 and N55-powered M135i, M235i, 335i, 435i, 535i, 640i, 740i plus select X models.

We use these valves in-house at MJ Modifications and customer feedback has been superb. Expect confident high-RPM stability, excellent sealing and durability under sustained exhaust gas temperatures on fast road, track day and tuned applications.

Key reasons to choose this upgrade

• Sodium cooled core moves heat away from the valve head to the stem for improved thermal management under load
• Precision machining and tight tolerances for dependable sealing and long service life
• OE-spec geometry for a true drop-in fit in N55 and S55 cylinder heads
• Proven on boosted builds and daily driven cars where longevity matters
• Sold individually so you can replace just what you need

Specifications

What you receive

• 1 x Supertech exhaust valve

Fitment guide

Engines: N55B30, S55B30

1 Series F20 F21 including LCI: M135i, M135ix

2 Series F22: M235i, M235ix

3 Series F30 F31 F34: 335i, 335ix, Hybrid 3

4 Series F32 F33 F36: 435i, 435ix

5 Series F07 GT, F07 GT LCI, F10 LCI, F11, F11 LCI: 535i, 535ix, Hybrid 5

6 Series F06 Gran Coupé, F06 LCI, F12, F12 LCI, F13, F13 LCI: 640i, 640ix

7 Series F01 LCI, F02 LCI: 740i, 740Li, 740LiX, Hybrid 7, Hybrid 7L

M Series F87 M2 Competition, F80 M3, F82 M4, F83 M4 including CS and GTS

X Series F25 X3 35ix, F26 X4 35ix and X4 M40ix, F15 X5 35ix and X5 40eX, F16 X6 35ix

Installation and support

Professional installation recommended. For expert fitting, book with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Why buy from us

Trusted by enthusiasts and builders, we run these valves in our own projects and our customers report excellent reliability on both stock and tuned setups. Buy with confidence from a BMW performance specialist.

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