NGK Spark Plug - BPR7EIX 4055

Iridium is a much harder and more durable metal than copper or platinum. This allows for a finer-wire center electrode, which requires less voltage to ignite, leading to a stronger spark and longer plug life.

Yes, it is crucial to check and adjust the gap to your vehicle's specific requirements before installation. While they may come pre-gapped, this is not always precise for every application.

Iridium IX plugs are designed for extended service life, often lasting significantly longer than standard copper plugs, typically up to 100,000 miles or more, depending on engine conditions and driving habits. Always refer to your vehicle's maintenance schedule.

While these plugs offer performance benefits, they must be compatible with your engine's specifications (thread size, reach, heat range, and gap). Always verify fitment for your specific vehicle.

It refers to the shape of the ground electrode. A taper cut reduces the mass of the electrode, which can help minimize the 'quenching' effect (where the spark is cooled and weakened by the electrode) and promote a more efficient burn.

Yes, the iridium tip is delicate. Handle the plug carefully and avoid touching the tip. Use appropriate tools and techniques during installation to prevent physical damage.

Verify the spark plug gap is set correctly. Ensure the plug is properly tightened and that all connections (e.g., spark plug wire/coil pack) are secure. Check for other potential engine issues.

Confirm the spark plugs are correctly installed and gapped. Check the ignition system for faults and ensure adequate fuel delivery.

Re-check the spark plug gap. Ensure no other engine maintenance is due. Consider the possibility of other factors affecting fuel economy, such as tire pressure or driving habits.

This may indicate a deeper engine issue (e.g., oil consumption, incorrect fuel mixture). Inspect the removed plug for specific fouling types and consult an automotive technician.