NGK Spark Plug Stock # 4730

The NGK Spark Plug Stock # 4730 (DPR8Z) is a premium electrode spark plug engineered for reliable ignition across a wide range of automotive engines. Whether you're performing routine maintenance on a daily driver or fine-tuning a modified engine build, this NGK plug delivers consistent performance and longevity. As a mechanic, you'll appreciate NGK's reputation for quality—these plugs are OEM-equivalent for countless vehicles and are a trusted choice for both stock and modified applications.

The DPR8Z features NGK's proven electrode design and ceramic insulator technology, which resists fouling and maintains optimal spark gap under varied load conditions. The precision-machined center electrode ensures efficient combustion, reducing misfire risk even in high-performance tuned engines where cylinder pressures and temperatures spike. The compact 0.85 × 0.75 × 3.1-inch form factor fits standard spark plug sockets, and the lightweight construction makes installation straightforward whether you're working in tight engine bays or prototype builds.

This spark plug suits both OEM replacements and modified engine applications, including carbureted and fuel-injected platforms. Technicians and enthusiasts value the DPR8Z for its durability at higher RPMs and its resistance to carbon buildup, particularly in engines running premium fuel or alternative ignition timing curves. Cross-reference your engine's specification chart to confirm compatibility, but this NGK plug covers a wide range of applications.