Review on NGK 94124 ILKAR7L11 Laser Iridium Spark Plug 4-Pack: Reliable Performance at its Finest by Knate Scarpelli

Engine started right after replacement, slightly more responsive than the 75,000 mile spark plugs that came in from the factory. The price couldn't be lower, Mazda dealers want to use OEM spark plugs at $25 each, but they seem like the perfect replacement for OEM quality. Box (no torque wrench required). A 14mm socket for removing spark plugs. It may be worth buying a special spark plug socket as the plugs are recessed into the valve cover. I used a short rubber hose to pull/insert the plugs. An 8mm socket is required to remove the coils and access the plugs.