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. 

• Improved ignitability equals more power
• Improved throttle response, fuel economy & less emissions 
• Machine rolled threads for trouble free installation & removal as well as protect heads
• Heat Range:  Hot
• Thread: 14mm
• Socket Size: 5/8in
• Reach + Tip:  708"  Projected
• Seat:  Taper Seat 
• Standard/Resistor:  Resistor
• Nominal Gap:  060