{"product_id":"precision-raceworks-bmw-e88-e90-f01-f16-spark-plug-gap-tool-with-feeler-gauge-inc-m135i-335i-740li-x6-m","title":"Precision Raceworks BMW Spark Plug Gap Tool\/Gapper with Built-In Gap Opener \u0026 Feeler Gauge (12mm\/14mm) for N54 N55 S55 - Fits M135i 135i 335i 435i 535i 740Li M2 M3 M4 X6 M","description":"\u003cdiv class=\"product__description rte\"\u003e\n  \n  \u003ch2\u003eBMW Plug Gap Gauge and Opener with Feeler Blades - 12 mm and 14 mm - Precision Raceworks Part Number 601-0109\u003c\/h2\u003e\n  \n  \u003cp\u003e\n    Achieve consistent ignition performance with this dedicated plug gap setting tool designed for BMW turbo straight six applications. The Precision Raceworks 601-0109 kit combines a precise gap opener with an included feeler gauge so you can adjust and verify the electrode gap quickly and accurately. Ideal for factory power or remapped setups where stable spark under load matters.\n  \u003c\/p\u003e\n  \n  \u003ch3\u003eKey benefits\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003ePurpose built gap setter for 12 mm and 14 mm plugs used across popular BMW turbo petrol engines\u003c\/li\u003e\n    \u003cli\u003eIntegrated gap opener for controlled, repeatable adjustments without guesswork\u003c\/li\u003e\n    \u003cli\u003eFeeler blades included for precise measurement and consistent results car to car\u003c\/li\u003e\n    \u003cli\u003eHelps reduce high boost misfires and rough running by ensuring uniform plug gaps\u003c\/li\u003e\n    \u003cli\u003ePerfect for servicing, plug changes, coil diagnostics and tuning sessions\u003c\/li\u003e\n    \u003cli\u003eCompact and workshop friendly - great at home or in a professional bay\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \n  \u003cp\u003e\n    We use this tool in house at MJ Modifications and it just works. Fast to set up, easy to repeat across a full set and our customers are consistently pleased with the smoothness and reliability it delivers on road and track.\n  \u003c\/p\u003e\n  \n  \u003ch3\u003eEngine and model coverage\u003c\/h3\u003e\n  \u003cp\u003e\n    Suits BMW platforms running 12 mm or 14 mm spark plugs commonly found on N54, N55 and S55 engines, including:\n  \u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003e1 Series E81 E82 E87 E88 135i N54 and N55, 135is\u003c\/li\u003e\n    \u003cli\u003e2 Series F20 F21 M135i and M135i xDrive\u003c\/li\u003e\n    \u003cli\u003e3 Series E90 E91 E92 E93 335i N54 and N55, 335xi, 335is\u003c\/li\u003e\n    \u003cli\u003e3 Series F30 F31 F34 335i and xDrive, ActiveHybrid 3\u003c\/li\u003e\n    \u003cli\u003e4 Series F32 F33 F36 435i\u003c\/li\u003e\n    \u003cli\u003e5 Series E60 E61 and F10 535i, xDrive variants, ActiveHybrid 5, F07 5 Series GT 535i\u003c\/li\u003e\n    \u003cli\u003e7 Series F01 740Li\u003c\/li\u003e\n    \u003cli\u003eM cars 1M E82, M2 F87 and M2 Competition, M3 F80, M4 F82 F83\u003c\/li\u003e\n    \u003cli\u003eX Series X3 F25 35i, X4 F26 35i, X5 E70 35i and F15 35i, X6 E71 35i and F16 sDrive35i and xDrive35i, X6 M E71\u003c\/li\u003e\n    \u003cli\u003eZ Series Z4 E89 35i and 35is\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003e\n    Not sure if your car uses 12 mm or 14 mm plugs or need guidance on target gaps for your tune. Get in touch and we will help.\n  \u003c\/p\u003e\n  \n  \u003ch3\u003eHow to use\u003c\/h3\u003e\n  \u003col\u003e\n    \u003cli\u003eSelect your target measurement using the included feeler gauge as specified by your tuner or service data.\u003c\/li\u003e\n    \u003cli\u003ePlace the plug in the tool and use the built in opener to adjust the ground electrode slowly and evenly.\u003c\/li\u003e\n    \u003cli\u003eConfirm the clearance with the feeler blade. Repeat until the blade slides with light, even drag.\u003c\/li\u003e\n    \u003cli\u003eMatch all plugs to the same reading for consistent cylinder to cylinder performance.\u003c\/li\u003e\n  \u003c\/ol\u003e\n  \n  \u003ch3\u003ePart number and manufacturer\u003c\/h3\u003e\n  \u003cp\u003e\n    Manufacturer: Precision Raceworks\u003cbr\u003e\n    Part number: 601-0109\n  \u003c\/p\u003e\n  \n  \u003ch3\u003eProfessional fitting and support\u003c\/h3\u003e\n  \u003cp\u003e\n    Prefer us to gap and install your plugs or want a health check on coils and ignition. MJ Modifications offers fitting and support at our Warwickshire workshop. Request a quote at \u003ca href=\"mailto:info@mjmodifications.co.uk\"\u003einfo@mjmodifications.co.uk\u003c\/a\u003e.\n  \u003c\/p\u003e\n  \n  \u003ch3\u003eWhy buy from MJ Modifications\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eBMW turbo specialists with hands on experience using this exact gap adjuster\u003c\/li\u003e\n    \u003cli\u003ePractical advice for N54, N55 and S55 ignition setups on stock and tuned cars\u003c\/li\u003e\n    \u003cli\u003eFriendly UK based support and quick dispatch\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \n  \u003ch3\u003eSearch terms customers use\u003c\/h3\u003e\n  \u003cp\u003e\n    BMW plug gap gauge, plug gap adjuster tool, electrode gap setter, ignition gap tool, 12 mm plug gap gauge, 14 mm plug gap gauge, misfire under boost fix, N54 plug gapping, N55 plug gapping, S55 plug gapping, M135i plug gap, 135i plug gap gauge, 335i plug gap tool, 435i plug gap setting, 535i plug gap adjuster, 740Li plug gap gauge, M2 plug gap tool, M3 plug gap gauge, M4 plug gap adjuster, X6 M plug gap, BMW turbo spark plug gauge, BMW coil and plug service tool, BMW performance plug gapping jig.\n  \u003c\/p\u003e\n  \n\u003c\/div\u003e","brand":"Precision Raceworks","offers":[{"title":"Default Title","offer_id":56008687255938,"sku":null,"price":51.51,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/5445\/8937\/files\/PrecisionRaceworksBMWE88E90F01F16SparkPlugGapToolwithFeelerGauge_Inc.M135i_335i_740Li_X6M_-1_1946x_2715ea7c-3ab5-43f2-ae8a-61589902876a.jpg?v=1764090751","url":"https:\/\/mjmodifications.co.uk\/products\/precision-raceworks-bmw-e88-e90-f01-f16-spark-plug-gap-tool-with-feeler-gauge-inc-m135i-335i-740li-x6-m","provider":"MJ Modifications","version":"1.0","type":"link"}