NGK Spark Plug BPR6EFS Pack of 8 — 18mm Reach, 0.8mm Gap, 5KΩ Resistor

This eight-pack contains genuine NGK Standard BPR6EFS (part number 3623) spark plugs shipped in original packaging and intended as direct replacements for a range of cars, inboard boat motors, garden machinery and small engines. Each plug uses a nickel-alloy construction with a 0.8mm factory gap and an 18mm thread reach, and includes a built-in 5K ohm resistor to help reduce radio-frequency interference. Torque recommendations differ by cylinder head material: tighten to 10.8–18 lb·ft for cast-iron heads and 7.2–14.5 lb·ft for aluminum heads.

Which vehicles and equipment work with these NGK BPR6EFS plugs?

These plugs suit many older and current models that specify the BPR6EFS heat range and thread reach. Common fitments include compact Ford models and European cars, plus some garden and marine engines that accept a standard 14mm thread and 18mm reach. Always cross-check your vehicle’s owner manual or an NGK parts database to confirm fitment before installing.

• Compatible car models often include Escort, Fiesta, Granada, Orion, Scorpio
• Small engines and inboard motors listed for the BPR6EFS spec
• Works as a direct replacement where NGK 3623 is specified

How do these plugs affect ignition reliability and electrical interference?

The integrated 5KΩ resistor helps suppress ignition noise that can affect radios and onboard electronics, while the NGK design focuses on consistent spark performance across operating conditions. These are standard-performance plugs rather than high-end iridium or platinum types, so they deliver dependable starting and combustion stability when properly gapped and installed.

• 5KΩ resistor reduces radio-frequency interference
• Factory-set 0.8mm gap for consistent spark energy
• Nickel-alloy electrode appropriate for standard maintenance intervals

What are the installation and torque guidelines I should follow?

Correct installation is important to avoid damage and ensure reliable operation. Start by confirming the 0.8mm gap and cleaning the plug seat; use a torque wrench and follow the torque range based on the cylinder head material to prevent stripping or improper sealing. Replace boots or seals as needed and inspect for correct seating and thread engagement.

• Check and maintain 0.8mm electrode gap before installation
• Tighten to 10.8–18 lb·ft for cast-iron cylinder heads
• Tighten to 7.2–14.5 lb·ft for aluminum cylinder heads

Are these genuine NGK parts and what’s included in the pack?

Yes — this listing is for genuine NGK Standard spark plugs packaged by NGK. You’ll receive eight individually boxed BPR6EFS 3623 plugs with original packaging materials and any manufacturer-supplied hardware or sleeves. They are intended as direct replacement parts and are ideal for owners performing multi-cylinder tune-ups.

• Pack of eight NGK BPR6EFS (3623) plugs in original NGK packaging
• Direct replacement for applications calling for this plug type
• Ideal for full-engine service or keeping spares on hand

Who this is for: technicians, DIY mechanics and vehicle owners who need a reliable, OEM-standard replacement spark plug set for light-duty passenger cars, inboard marine motors, lawn and garden equipment, and small engines. Choose this pack when your engine specification calls for an NGK BPR6EFS with an 18mm reach, 0.8mm gap and onboard resistor — especially useful when servicing multiple cylinders or stocking parts for recurring maintenance.