ACCEL U-Groove performance spark plugs produce a larger spark for more power at high RPMs. Improves throttle response & fuel economy, less fouling. Purified Alumina insulator prevents arcing. Machine rolled threads protect heads. 044 gap.

ACCEL U-Groove performance spark plugs are the only plugs manufactured exclusively for high performance street and racing engines. The product is the colder heat range. Price is Each 4 are required

Availability: Usually ships 24 hours