269 Motorsports NGK V-Power BR7EF Spark Plugs Set of 8 — 14mm Thread, .708in Reach for Tapered-Seat Engines

These NGK BR7EF plugs deliver a factory-style fit in applications that specify a 14mm thread and tapered seat, with a .708 in (18 mm) reach for the correct electrode-to-combustion chamber positioning. Sold as a set of eight, they’re intended for engines that require multiple cylinders to be serviced at once — ideal when performing a full tune-up. NGK’s V-Power line is built to industry standards, providing consistent gap tolerance and durable electrode materials for regular driving conditions.

Which engines use the BR7EF 3346 spark plug?

The BR7EF fits engines specified for a 14mm thread, tapered seat, and .708 in (18 mm) reach. Check your vehicle’s service manual or OEM plug code to confirm compatibility before ordering to ensure proper fit and performance.

• 14mm thread diameter and tapered seating requirement
• .708 in (18 mm) reach to match cylinder head depth
• Sold as a set of eight for multi-cylinder engines
• Compare OEM plug codes to NGK cross-reference for correct match

How do these spark plugs affect everyday driving?

Properly matched spark plugs help maintain smooth starts, consistent idle, and steady throttle response by providing reliable spark timing and gap integrity. While they don’t increase horsepower dramatically, replacing worn plugs restores the ignition characteristics the engine was designed for.

• Restores consistent spark delivery and idle stability
• Helps maintain fuel combustion efficiency when gasketed correctly
• Sold in a complete set to ensure even performance across cylinders

What are the physical specifications I need to know?

These NGK BR7EF plugs use a tapered seat and 14mm thread with a .708 in reach, which are critical measurements for proper installation and engine sealing. Verify electrode type and heat range by checking NGK part references and your vehicle’s recommended spark plug chart.

• Tapered seat for correct sealing with compatible cylinder heads
• 14mm thread diameter common on many small- to mid-size engines
• .708 in (18 mm) reach to match plug recess depth
• Included quantity: set of 8 for multi-cylinder maintenance

How should I install and gap these plugs?

NGK plugs typically ship pre-gapped within a tolerance, but you should confirm and adjust the gap to your vehicle manufacturer’s specification before installation. Hand-thread the plug first to avoid cross-threading, then torque to the factory-recommended value using a torque wrench or the specified method for tapered-seat plugs.

• Verify and adjust gap to OEM spec prior to installation
• Start threads by hand to prevent cross-threading
• Tighten to manufacturer torque for tapered-seat plugs
• Replace all plugs in multi-cylinder engines as a set for even wear

Who is this for: This NGK BR7EF 3346 set of eight is aimed at mechanics, DIY enthusiasts, and fleet technicians restoring ignition performance on engines that call for a 14mm threaded, tapered-seat spark plug with a .708 in reach. Choose this set when your vehicle’s parts list or NGK cross-reference indicates the BR7EF code, and when you prefer a full-set replacement for consistent, balanced ignition across all cylinders.