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NGK Racing Spark Plugs R7437-8 & R7437-9 | MGM Leeds
NGK Racing Spark Plugs R7437-8 & R7437-9 | MGM Leeds
NGK Racing Spark Plugs R7437-8 & R7437-9 | MGM Leeds
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NGK Competition R7437-9 (x5) Angled Ground Spark Plug Set of 5 - 1.8 2.0 TSI EA888 Gen3 (IS38) 2.5 TFSI DAZA DNWA DNWC

R7437-9/5
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£225.00
Tax included

High-performance NGK Racing Spark Plugs (R7437-8 & R7437-9) designed for Stage 1-2+ modified engines. Features iridium hard-top electrodes for extreme thermal stress and racing conditions.

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The NGK R7438-8 (Stock No. 4905) is a premier racing spark plug specifically engineered for modern high-performance engines, such as the VAG EA888 Gen 3. Designed to thrive under the severe mechanical and thermal stress of tuned applications, it features a fine-wire iridium center electrode and a specialized angled platinum ground strap for maximum durability and consistent ignition.

NGK R7438-8 Racing Spark Plug Main View

Core Performance Features

  • Fine-Wire Iridium Center Electrode: Offers a high melting point and superior durability while ensuring a consistently stable spark for high-tech engines.
  • Angled Platinum Ground Strap: Provides enhanced protection for the internal ceramic and is specifically designed for high-vibration racing environments.
  • Trivalent Metal Plating: Delivers superior anti-corrosion and anti-seizing properties for long-term reliability.
  • Pure Alumina Silicate Ceramic Insulator: Provides better heat transfer and superior strength to prevent flashover.
  • Triple Gasket Seal: Eliminates combustion gas leakage through the shell, ensuring peak cylinder pressure is maintained.

Choose Your Heat Range

The R7438 series is available in different heat ranges to suit your specific climate and tuning level. Correct selection is vital for preventing misfires or engine damage.

UK & Moderate Climates (Heat Range 8)

The R7438-8 is generally recommended for UK-based vehicles running Stage 1 or Stage 2 tuning levels.

NGK R7438-8

Warm Climates (Heat Range 9)

The colder R7438-9 variant is often preferred for warmer climates or more aggressive Stage 3+ builds.

NGK R7438-9

Technical Specifications & Compatibility

The R7438-8 is a resistor-type plug with a 1.0mm solid connector, primarily used in 1.8TSI and 2.0TSI EA888 engines.

NGK R7438-8 Technical Dimensions
Category Specifications
Thread Diameter / Reach 14mm / 26.5mm (1.04")
Hex Size 16mm (5/8")
Factory Gap 0.8mm (0.031")
Key Applications VW Golf Mk7/8 GTI/R, Audi S3 8V/8Y, Leon Mk3/4 Cupra

Professional Installation

These plugs feature an extremely delicate ground electrode and are pre-set from the factory; manual gapping is not advised. For optimal performance and safety, professional fitting is recommended.

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IMPORTANT NOTE: Ensure you check your vehicle's specific tuning requirements. For those seeking even higher heat resistance, consider the NGK R7437-9 series.

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