Bosch 509 Super 4 Spark Plug x4
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includes Accessories + Fitting
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The Bosch Super 4 operates on the state-of-the-art air-cushion-spark principle and is the first spark plug to feature four thin ground electrodes with one pointed, silver-plated center electrode.
This combination is unique in the world and has decisive benefits. The ignition spark always chooses the best path for reliable ignition according to the engine load. The Bosch Super 4 does more than a conventional spark plug. In all situations, throughout its service life.
Features & Benefits
- Noticeable improvement in acceleration
- Significantly improved engine smoothness
- Superior engine versatility
- Electrode gap adjusted ex factory
Additional InformationPlease check with your vehicle manufacturer or workshop manual to confirm the suitability of this part for your vehicle.
Hex Size: 16 Thread Length mm: 19 Thread Size mm: 14 x 1.25
Bosch 509 Super 4 Spark Plug x4 is rated out of 5 by 2.Rated 5 out of 5 by Hamischok from Good value for money All my life used bosh spark plugs, best for performance and priceDate published: 2014-01-03Rated 5 out of 5 by LivinonaPrayer from Bosch super 4 I changed my old NGK plugs at 66k miles with these, and they transformed the performance of my car (Rover 25 1.4). It idles smoother, and the power delivery is seamless, plus it's using less fuel now. Overall i'm very pleased with this purchase and would recommend to anyone wanting to upgrade their plugs in the future. Bosch plugs are often criticized for being unreliable and generally not as good as NGK's, but in this case they have performed as well in my car. I mostly do short trips about 2 miles a day, and 2 days of about 30 miles a week. So the four electrode design is perfect for this because they can keep performing cleanly.Date published: 2013-03-13
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