Racing Plug AR133

Precise ignition timing is critical in competitive racing, and the Racing Plug AR133 delivers the spark consistency you need to maintain peak power across high RPM ranges. The non-resistor design eliminates suppression circuitry, allowing maximum electrical energy to reach the combustion chamber—essential when every horsepower counts. If you're tuning an engine for racing applications, this plug's optimized geometry ensures reliable firing in demanding conditions where standard plugs fall short.

• 14 mm thread size
• 0.460 inch reach
• Tapered seat design
• Non-resistor construction
• Sold individually
• Racing-spec performance
• Optimized ignition geometry