Precision Raceworks BMW Spark Plug Gap Tool with Feeler Gauge - 12 mm and 14 mm
Get your BMW running at its best with the Precision Raceworks Spark Plug Gap Tool with feeler gauge. This purpose-built spark plug gapper is designed for 12 mm and 14 mm spark plugs and features a built-in gap opener for fast, repeatable and accurate spark plug gapping. Perfect for N54, N55 and S55 powered BMWs that demand consistent ignition performance on stock or tuned setups.
Why this spark plug gap tool
- Correctly gaps 12 mm and 14 mm spark plugs for BMW turbo engines
- Built-in spark plug gap opener for precise, controlled adjustments
- Includes feeler gauge for accurate measurement and repeatable results
- Helps reduce misfires and improve smoothness by setting a consistent spark plug gap
- Ideal for maintenance, upgrades and tuning on N54, N55 and S55 ignition systems
- Compact, workshop-friendly design - easy to use at home or in a professional environment
We use this tool in-house at Nforcd and it has been a reliable, simple solution for setting plug gaps correctly. Customers consistently rate it highly for ease of use and the consistent results it delivers on performance BMWs.
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Compatibility - BMW models and engines
Designed for BMW platforms using 12 mm and 14 mm spark plugs, commonly found on N54, N55 and S55 engines:
- 1 Series E81 E82 E87 E88 - 135i N54, 135i N55, 135is
- 2 Series F20 F21 - M135i, M135i xDrive
- 3 Series E90 E91 E92 E93 - 335i N54 and N55, 335xi, 335is
- 3 Series F3x - 335i, 335i xDrive, ActiveHybrid 3
- 4 Series F3x - 435i
- 5 Series E6x and F10 - 535i, 535xi, 535i xDrive, ActiveHybrid 5, 5 Series GT F07 535i
- 7 Series F01 - 740Li
- M cars - 1M E82, M2 F87 and M2 Competition, M3 F80, M4 F8x
- X Series - X3 F25 35i, X4 F26 35i, X5 E70 35i, X5 F15 35i, X6 E71 35i, X6 F16 sDrive35i and xDrive35i, X6 M E71
- Z Series - Z4 E89 35i and 35is
If you are unsure about compatibility with your specific BMW model or engine, contact us and we will be happy to help.
How to use
Select your target gap using the included feeler gauge, use the built-in gap opener to adjust the electrode carefully, and verify the measurement with the gauge for a consistent, repeatable spark plug gap.
Part number
601-0109
Manufactured by
Precision Raceworks
Fitting and support
Prefer professional fitting or want us to gap and install plugs for you? Nforcd offers fitting and support at our Warwickshire workshop. Request a quote at Sales@nforcd.com.
Why buy from Nforcd
- BMW performance specialists with hands-on experience using this exact tool
- Trusted advice for N54, N55 and S55 ignition set-ups
- Friendly UK-based support