These are AUTHENTIC factory replacement N54 Bosch 3-electrode plugs suitable for factory and modified applications up to 475whp. Compared to NGK plugs they offer a longer life and do not require manual gapping during installation. We suggest these for most factory turbo N54 BMW applications. Beware of counterfeit Bosch plugs being sold for $5-6 each on eBay and Amazon. They do not offer the same performance, lifespan, and knock resistance.
Drive Size: 14mm Double Hex