NGK TR5 #2238 Spark Plugs - Set of 8 Nickel Copper Plugs for LS Engines

NGK TR5 2238 Spark Plugs - Set of 8 Fits 1997-2013 LS-Based V8 Engines 4.8L 5.3L 5.7L 6.0L 6.2L These NGK TR5 V-Power Nickel/Copper spark plugs are a stock replacement heat range for most naturally aspirated LS car & truck engines. They feature a specially designed V-grooved center electrode, improving ignitability and reducing quenching. Copper core spark plugs are an economical alternative to exotic metal plugs in applications where extended service intervals are not required. This plug is not recommended for boosted, nitrous or high compression applications (see colder plugs such as the TR6 or BR7EF for those applications). Factory Pre-gapped to .040" Cold-rolled threads prevent cross-threading and damage to cylinder heads Trivalent plating eliminates need for anti-seize on threads High-grade alumina silicate ceramic creates a stronger insulator to reduce dielectric punch-through 98% pure copper core increases heat dissipation for reliable starts and prevents spark plug overheating 90 degree V-Groove center electrode allows the spark to occur closer to the outside of both the center and ground electrodes for better flame expansion and improved ignitability NGK spark plugs are tested to the highest OEM original equipment standards 14mm Thread, .708" reach, 5/8" Hex