NGK Iridium IX Spark Plug for Aprilia Tuono V4 Factory (2015-2022) CR9EIX Honda Valkyrie If you're in between sizes

If you're in between sizes we recommend ordering the smaller size

breathable and comfortable

for a secure

7-10 Medium

The 4 layers impact protection have different densities

NGK Iridium IX Spark Plug for Aprilia Tuono V4 Factory (2015-2022) CR9EIX Honda Valkyrie If you're in between sizesNGK Iridium IX Spark Plug for Aprilia Tuono V4 Factory (2015 2022) CR9EIX (Gap 0. 8mm) NGK IX Iridium Series plugs were designed specifically for the performance enthusiast. Fine wire center electrode ensures high durability and a consistently stable spark. Iridium alloy has an extremely high melting point, perfect for today's high tech, high performance engines. Trivalent metal plating provides superior anti corrosion and anti seizing properties