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Roush Colder Spark Plugs 401546

Roush Performance 401546 - Roush Colder Spark Plugs

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Spark Plug, Copper Core, 14mm Thread, Tapered Seat, 5/8 in. Hex, Each

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Brand: Roush Performance

Manufacturer's Part Number: 401546

Part Type: Spark Plugs

Product Line: Roush Colder Spark Plugs

Summit Racing Part Number: RSP-401546

UPC: 8446401546

Shorty Spark Plug: No

Resistor: Yes

Electrode Core Material: Copper

Insulator Type: Projected

Spark Plug Thread Size: 16mm

Spark Plug Seat Style: Tapered

Wrench Diameter: 5/8 in.

Ground Strap Quantity: Two

Quantity: Sold individually.

Notes: Designed for turbo or supercharger with high cylinder pressure.

In-Store Pickup: Choose In-store pick-up (OH, GA, NV) on our web site.

Roush Colder spark plugs are specifically designed to handle the high boost pressure and airflow of RoushCharged, turbocharged, and supercharged engines. These high performance plugs help to prevent the preignition and detonation of fuel due to high cylinder temperatures, and they operate on a heat range colder than stock Mustang plugs.


Some parts are not legal for sale or use in California on any pollution-controlled motor vehicles

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