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NGK R7438-8: High-performance racing plug featuring an Iridium center and angled platinum ground electrode, optimized for Stage 1-2 tuned 1.8 2.0 EA888 Gen 3 engines.
Fast UK Delivery on all Orders, please see delivery information.
All returns must be postmarked within fourteen (14) days of the purchase date. All returned items must be in new and unused condition, with all original tags and labels attached.
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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.

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

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

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

| 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 |
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.