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.  035 gap.

• U-Groove performance spark plugs - 8 pack - #0566
• Larger spark for more power at high RPMs
• Improved throttle response, fuel economy & less fouling
• Purified Alumina insulator prevents arcing
• Machine rolled threads protect heads
• 035 gap