ACCEL 0574S-4 U-Groove Spark Plug Header Plug

Spark PlugU-Groove Spark Plug Header PlugU-Groove Spark Plug Header Plug; 14mm Thread; .460 in. Reach; Heat Range 5; Tapered Seat; 5/8 Hex; Projected Tip; Resistor; 4 Pack;SPECIFICATIONS:WARNING CA Proposition 65: No FEATURES: Header-Box U-Groove Ground Electrode Five-Rib Aluminum Insulator Copper Core Nickel/Chrome Steel Electric Heat Seal Copper-Glass Gas-Tight Seal Less Flame Dissipation ACCEL U-groove performance spark plugs produce a larger spark for more power at high RPMs. Improves throttle response and fuel economy, less fouling. Purified alumina insulator prevents arcing. Machine rolled threads protect heads.For more than 40 years, ACCEL has been a leader in performance fuel and ignition systems, proving itself on the racetracks and drag strips of the world - and on the street. With an ever-expanding line of SuperCoils and all the spark plug wires, tune-up kits, and fuel injectors hot rodders have trusted and relied on for years, ACCEL is constantly developing innovative new