Ngk Spark Plug Stock 4922

OVERVIEW

When it comes to maintaining the heart of your air-cooled Volkswagen, the ignition system is where performance begins and ends. The NGK Stock 4922 (BR6ES) Standard Spark Plug is the gold standard for enthusiasts who demand unwavering reliability and consistent spark delivery. Engineered specifically to handle the unique thermal challenges of the VW flat-four engine, this resistor-type plug features a high-grade alumina silicate ceramic insulator that provides superior insulation and heat dissipation. Whether you are cruising the coastline in a classic Beetle or pushing the limits in a high-performance sand rail, these plugs ensure that your combustion cycle remains efficient, reducing the risk of fouling and improving overall throttle response. The trivalent metal plating offers superior anti-corrosion and anti-seizing properties, which is vital for engines exposed to the elements or stored for long periods between rallies.

The BR6ES is a specific 3/4-inch (0.749") reach plug, which is a critical distinction for the air-cooled specialist. While standard factory Volkswagen cylinder heads typically utilize a shorter 1/2-inch reach, many of the performance aftermarket heads commonly found on built 1776cc to 2332cc enginessuch as the CB Performance 044 or EMPI GTV-2 seriesrequire this longer reach to position the spark kernel correctly within the combustion chamber. By using the NGK 4922, you are opting for a plug that features a corrugated rib design to prevent flashover and a pure copper core that deeply dissipates heat, preventing pre-ignition under the high-stress conditions often seen in heavy-duty Type 1 or Type 2 builds. Trusting your ignition to NGK means you are choosing a component that has been tested to the highest standards of the automotive industry, ensuring that your vintage VW stays on the road and out of the shop.

FITMENT

This spark plug is designed for Volkswagen air-cooled engines equipped with aftermarket or performance cylinder heads requiring a 3/4-inch (19mm) reach. Always verify your head specifications before installation.

• VW Beetle (Sedan & Convertible): 1950-1979 (With 3/4-inch reach performance heads)
• VW Bus / Transporter / Kombi: 1950-1971 (With 3/4-inch reach performance heads)
• VW Karmann Ghia: 1956-1974 (With 3/4-inch reach performance heads)
• VW Type 3 (Squareback, Fastback, Notchback): 1961-1973 (With 3/4-inch reach performance heads)
• VW Thing (Type 181): 1973-1974 (With 3/4-inch reach performance heads)
• Custom Dune Buggies, Sand Rails, and Trikes: Utilizing 1600cc to 2332cc air-cooled engines with long-reach head configurations.
• Aftermarket Head Compatibility: Fits most CB Performance 044, Magnum, and EMPI GTV series heads.

SPECS

• Brand: NGK Spark Plugs
• Stock Number: 4922
• Part Number: BR6ES
• Thread Diameter: 14mm
• Thread Reach: 0.749 Inch (19mm / 3/4-inch)
• Seat Type: Gasket
• Hex Size: 13/16 Inch (21mm)
• Resistor Type: Yes (5k Ohm)
• Heat Range: 6 (NGK Standard Scale)
• Center Electrode Material: Nickel with Copper Core
• Ground Electrode Material: Nickel
• Terminal Type: Removable Nut
• Gap Setting: 0.028 Inch (0.7mm) - User adjustable

PRO TIPS

1. Verify Your Cylinder Head Reach Before Installation

The single most important rule for any VW engine builder is to never assume the reach of your spark plugs. Standard VW Type 1 heads usually take a 1/2-inch reach plug (like the B6HS), but many performance heads require this 3/4-inch reach BR6ES. If you install a 3/4-inch reach plug into a 1/2-inch head, the threads will protrude into the combustion chamber, leading to carbon buildup that makes removal impossible or, worse, causing the piston to strike the plug. Conversely, using a short plug in a long-reach head will shroud the spark and destroy the threads in the head. Always measure the depth of your spark plug hole with a dedicated tool or a depth gauge to ensure the BR6ES is the correct fit for your specific build.

2. Use a Torque Wrench and Anti-Seize Sparingly

Air-cooled engines utilize aluminum alloy cylinder heads which are extremely sensitive to thread damage. When installing your NGK BR6ES plugs, we recommend applying a very small amount of high-temperature nickel anti-seize to the threads to prevent "galling" or seizing due to the constant heat cycles. However, you must be careful: anti-seize acts as a lubricant and can lead to over-torquing. Always use a torque wrench and set it to 18-21.6 lb-ft (25-30 Nm) for a 14mm thread in an aluminum head. Proper torque ensures the gasket seat is crushed correctly, creating a gas-tight seal and allowing the plug to dissipate heat efficiently into the cylinder head.

3. Dial In Your Gap for Your Ignition System

While NGK plugs come pre-gapped, you should always check and adjust the gap to match your specific ignition setup. For a standard points-and-condenser ignition, a gap of 0.024" to 0.028" is typical. However, if you have upgraded to a high-output electronic ignition like a Pertronix Ignitor or a CDI system, you may benefit from opening the gap slightly to 0.032" to 0.035" to create a larger, more powerful spark. Always use a wire-style gap gauge rather than a "coin" style gauge to avoid damaging the center electrode, and ensure the ground strap remains parallel to the center electrode for the most consistent spark path.