The Denso Iridium IK20, IK22, IK24 spark plugs are the perfect plugs for Stock TT, BPU (up to 20psi) and IK24 Small to mid sized single turbo 66mm.

V-Groove minimizes miss on higher boosted cars and the Iridium tips are the smallest there are, which enables a clean burn and with Ir as the material a very high heat saturation capability, which helps kill washout from high heat, high boost applications.

You will receive a set of six DENSO Iridium spark plugs.

Gap Suggestions: Stock TT, leave the gap stock out of the box. BPU, ideally, gap down to .038" from .044 (out of box). Single turbo, if you have a good ignition system and coils, try .032-.035" and adjust downwards if missing. However please keep in mind that you really shouldn't be regapping an iridium plug. If you're not sure what gap works best, you may consider sticking with a traditional copper core plug and finding the gap needed, then getting a set of these afterwards.