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Spark Plug, Racing, Flat Seat, 12mm Thread, 1.043 in. Reach, Resistor, Each
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Estimated Ship Date from Ohio: Monday 11/16/2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
R2558E-10
Part Type:
Product Line:
Summit Racing Part Number:
NGK-97278
Item Number:
6821545
UPC:
087295972786
Spark Plug Thread Size:
12mm
Spark Plug Reach (in.):
1.043 in.
Spark Plug Reach (mm):
26.49mm
Spark Plug Seat Style:
Flat
Manufacturer Heat Range:
10
Shorty Spark Plug:
No
Resistor:
Yes
Electrode Tip Material:
Iridium
Electrode Core Material:
Copper
Center Electrode Type:
Non-projected
Wrench Diameter:
14mm
Ground Strap Quantity:
One
Quantity:
Sold individually.
NGK Racing Spark Plugs
What's firing your engine? NGK racing spark plugs are built to withstand the severe mechanical and thermal shock associated with high-revving, high-compression engines. NGK racing plugs feature special electrode materials—precious metals like platinum, iridium, and ruthenium—for greater durability and low voltage requirements. Fine-wire center and ground electrodes provide better sparking and enhanced ignitability. And, the unique arrangement of insulator noses improves throttle response! Whether you're a weekend warrior or an expert racer, rocket your way to victory with racing spark plugs from NGK—the people who spark winners!
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Some parts are not legal for use in California or other states with similar laws / regulations
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