SKU: NGKR2558E-9
MPN: R2558E-9
The NGK Spark Plug Stock #97537 (MPN: R2558E-9) is a precision-engineered racing spark plug designed for high-performance automotive and powersports applications where reliable ignition under extreme conditions is non-negotiable. Built to NGK's exacting standards, this resistor-type spark plug delivers consistent spark delivery and noise suppression in engines demanding premium fuel economy and throttle response. Whether you're running a competition build, maintaining fleet vehicles, or tuning a performance platform, this NGK racing spark plug provides the electrode geometry and thermal range engineering teams specify when reliability cannot be compromised.
Engineered with a 14 mm thread diameter and 26.5 mm reach, the NGK R2558E-9 is designed to seat flush against the gasket in compatible cylinder heads without fouling or gap drift under sustained load. The resistor design suppresses electromagnetic interference while maintaining optimal spark energy—critical in applications with sensitive electronics or proximity to communications equipment. NGK's proprietary insulator material and precious-metal electrode construction ensure consistent firing across temperature swings, from cold-start conditions to sustained high-RPM operation, while the gasket seating method provides a reliable seal that prevents compression leakage and carbon tracking.
This spark plug serves technicians, fleet managers, and performance enthusiasts who need OEM-equivalent or upgrade-level ignition components for vehicles that demand precision engineering. The compact 0.09 lb weight and 3.85-inch length allow straightforward installation in tight engine bays typical of modern powerplants. Verify thread pitch, reach, and heat range compatibility with your engine's specification sheet before purchase; NGK publishes detailed cross-reference charts to ensure correct fitment. Stock this NGK racing spark plug for critical maintenance intervals or rebuild projects where ignition reliability directly impacts overall vehicle performance and longevity.
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