HKS M45XL M-Series Super Fire Racing Spark Plugs for HYUNDAI N

The HKS M-Series Super Fire Racing Spark Plug has been developed to provide your vehicle with smooth acceleration, and improved performance throughout the entire RPM Range. These spark plugs are a #9 heat range, and are an ideal spark plug for those with mild to extensive bolt-ons. With iridium technology, the HKS M-Series Super Fire Racing Spark Plugs will provide enough spark energy and performance for spirited driving, or the occasional track weekend. If it’s time to maintain your vehicle with a refreshed tune, you should include the HKS M-Series Super Fire Racing Spark Plug to make sure your car is running at optimal levels.

Sold as a set of 4 spark plugs

 “What is the ideal spark plug gap size for my Elantra N — 0.028 or 0.027? Which one do you recommend?” “What size is the one they sell?” Thanks

really depends on the car (mods, ecu tune, etc). .028 is ideal

What are these gapped to? .030 or .028?

they should be .030 but for sure should be checked and adjusted prior to installation