NGK Laser Iridium Spark Plugs – SILZKBR8D8S 97506 (4-Pack)

[3d_viewer id=”6866″] Product Description: NGK’s SILZKBR8D8S Laser Iridium spark plugs are engineered for high-boost, high-compression turbo engines. With a fine-wire iridium center electrode and a platinum-tipped ground strap, they deliver optimal spark precision, improved throttle response, and long service life. Perfect for tuned BMW platforms including the B58, N55, S55, and even two-step colder upgrades for the N54. Fitment: BMW 135i / 335i (N54, N55) BMW 340i / 440i (B58) BMW M2 / M3 / M4 (S55 – 2015–2020) BMW 535i, 640i, X3, X5, X6 turbo models (N55/B58) Also fits other turbocharged B-series engines with 12mm thread One-step colder for N55/S55, two-step colder for N54. Check tune setup before choosing. Specifications: NGK Part #: 97506 Thread Size: 12mm x 1.25 Reach: 26.5mm Hex Size: 14mm Seat Type: Gasket Heat Range: Cold Gap: 0.030″ (preset) Electrode: Iridium center, Platinum ground Resistor: Yes (5k Ohm) Torque (Aluminum): 15.5–18 lb-ft Sold: Set of 4 Made in Japan