Most ATS-V owners who have their cars tuned for higher boost run colder spark plugs. This a good idea because it helps reduce pre-detonation and the ECM’s knock retard response, which reduce ignition timing advance and horsepower. We recommend and stock NGK 6510 iridium plugs, and now have these in stock for immediate shipment. Stock ATS-V plug gap is .030 to .035″. With increased boost you’ll want to gap these at .027″ for maximum performance. Contact us today to make sure you have the proper spark plugs for the best performance on and off the track!