Supertech BMW N55 S55 Exhaust Valve - the performance exhaust valve upgrade trusted by enthusiasts and engine builders for BMW N55 and S55 engines. If you are rebuilding your N55 or S55, chasing reliable power on road or track, or simply refreshing a high mileage valvetrain, this Supertech sodium filled exhaust valve delivers OE fit with motorsport grade durability and heat control. Perfect for BMW M135i, M235i, 335i, 435i, 535i, 640i, 740i, X3 35i, X4 35i, X4 M40i, X5 35i, X5 40e, X6 35i and S55 powered M2 Competition, M3 and M4 models.
We run Supertech valves in our own builds and our customers consistently report excellent reliability, stable valve control at high RPM and peace of mind under sustained high exhaust gas temperatures. Supertech’s precision manufacturing, premium materials and strict quality standards make this an ideal choice for tuned and stock engines alike.
Why choose Supertech Exhaust Valves for BMW N55 and S55
- Sodium filled design helps dissipate heat from the valve head to the stem for improved thermal stability under load
- Premium materials and tight tolerances for durability, longevity and consistent sealing
- Direct fit for N55B30 and S55B30 applications - ideal for engine refresh, rebuild or performance upgrades
- Proven on fast road, track day and high boost setups
- Sold individually so you can replace exactly what you need
Specifications
| Manufacturer | Supertech |
| Model number | BMEVI-1055S-HS |
| Part number | BMEVI-1055 |
| Head diameter | 28.00 mm |
| Stem diameter | 5.96 mm |
| Overall length | 112.9 mm |
| Material | Sodium filled |
| Sold | Individually |
What’s included
- 1 x Supertech Exhaust Valve
Compatibility - BMW N55 and S55 applications
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 GTS and CS
X Series - F25 X3 35ix, F26 X4 35ix and X4 M40ix, F15 X5 35ix and X5 40eX, F16 X6 35ix
Fitting and support
Professional installation is recommended for best results. For expert fitting, we offer installation at Nforcd in Warwickshire. Request a fitting quote at Sales@nforcd.com.
Buy with confidence
Nforcd supplies genuine Supertech valvetrain components. We have installed these valves in-house and our customers have been very happy with performance and reliability on both stock turbo and tuned setups.
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