HKS Nissan/Infinity VQ35HR M-Series Spark Plugs (One Step Colder)

If you're pushing your Nissan or Infinity VQ35HR engine a bit harder, maybe with some tuning or forced induction, you'll want to make sure your spark plugs can keep up. These HKS M-Series spark plugs are designed to run one step colder than stock, which helps prevent pre-ignition and detonation under increased cylinder pressures and temperatures. This is a common upgrade when modifying these engines to handle the extra stress.

HKS uses a durable metal-iridium alloy for both the center and ground electrodes. This material offers excellent resistance to wear and erosion, ensuring a consistent spark over a longer service life compared to standard copper plugs. The M45HL designation means it's specifically tuned for the VQ35HR, offering a direct fit and the correct heat range for modified applications. Proper spark plug heat range is crucial for engine health and performance, especially when you're asking for more power.