ACCEL 0437S-4 U-Groove Spark Plug Header Plug

Spark PlugU-Groove Spark Plug Header PlugU-Groove Spark Plug Header Plug; 14mm Thread; .375 in. Reach; Heat Range 6; Gasket Seat; 13/16 Hex; Projected Tip; Resistor; 4 Pack;SPECIFICATIONS:WARNING CA Proposition 65: No FEATURES: C-Cut Ground Electrode Resistor Shorty Plugs 14mm Thread - .375 in. Reach Flat/Gasket Seat Projected Tip 13/16 in. Hex 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 products designed to push power, speed, and per