2.5 TFSI EA855 NGK upgrade Spark plugs

5 upgrade NGK Iridium spark plugs for all 2.5 TFSI EA855 Audi RS3 and TTRS engines. Iridium spark plugs especially for turbo engines with increased boost pressure and high performance. The electrode gap of the standard spark plug is 7-8 mm. With increased boost pressure the spark can sometimes be "blown out" and misfiring can occur. With our NGK plugs, we reduce the gap to 6 mm. No modifications, no electrode pressing, simply install. Features: Ideal for Stage 1 and Stage 2 Electrode gap: 0.6 mm Heat value: 7 Thread: M14 x 1.25 better cold start better engine performance lower fuel consumption more complete combustion reduced emissions and cleaner exhaust gases (Example picture, 5 pieces are supplied)