Description
A spark plug is only as reliable as its ability to fire consistently under demanding conditions. The DENSO W27ESR-U 4045 delivers OE-level dependability with engineering designed to eliminate misfire and voltage loss, ensuring optimal combustion efficiency across your engine’s RPM range. Whether you’re running stock power or forced induction, this plug maintains stable ignition performance lap after lap.
- 100% pre-fired for reliability
- Copper core center electrode
- Superior thermal conductivity
- Five-rib insulator design
- Reduces flashover and voltage loss
- Dual copper and glass seal
- Gas-tight seal construction
- OE automotive specification
- MPN: 4045






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