Bosch OE Fine Wire Platinum Spark Plugs feature a specially engineered, yttrium enhanced ground electrode that provides 2X longer service life compared to standard copper plugs Unique 360 degree, continuous laser welded fine wire platinum firing pin design delivers better corrosion resistance, ignitability, and performance Ribbed insulator design keeps flash-over causing oil, grime, and debris out of the spark plug wire or coil on plug boot, ensuring electrical energy goes into the spark plug - not around it - preventing misfire Nickel-plated rolled threads provide exceptional resistance to corrosion and do not require anti-seize - making installation quick and easy Bosch OE Fine Wire Platinum spark plugs are pre-gapped at the factory and ready to install right out of the box - gap adjustment prior to installation not required Compatible with select vehicles including, but not limited to, the following (Note: engine affects fitment - verify specific fitment details with fit checker above): BUICK: 02-05 Century, 05-09 LaCrosse, 96-05 LeSabre, 06-08 Lucerne, 95-05 Park Avenue Compatible with (cont): BUICK: 96-04 Regal, 02-07 Rendezvous, 05-06 Terraza; CADILLAC: 99-00 Escalade; CHEVROLET: 96-05 Astro, 96-05 Blazer, 96-02 C1500, 96-99 C1500/2500 Suburban, 96-00 C2500/3500, 93-02 Camaro, 93-95 Corvette, 05-09 Equinox Compatible with (cont): CHEVROLET: 96-14 Express 1500, 96-06 Express 2500, 96-02 Express 3500, 00-05 Impala, 96-99 K1500, 96-99 K1500/2500 Suburban, 96-00 K2500/3500, 02-06 Malibu, 98-05 Monte Carlo, 96-04 S10, 99-13 Silverado 1500, 96-99 Suburban 1500 Compatible with (cont): CHEVROLET: 96-00 Tahoe, 05-06 Uplander, 02-05 Venture; GMC: 96-99 C1500, 96-99 C1500/2500 Suburban, 96-00 C2500/3500, 96-03 Jimmy, 96-99 K1500, 96-99 K1500/2500 Suburban, 96-00 K2500/3500, 96-05 Safari, 96-14 Savana 1500 Compatible with (cont): GMC: 96-06 Savana 2500, 96-02 Savana 3500, 99-13 Sierra 1500, 96-04 Sonoma, 96-00 Yukon; PONTIAC: 95-05 Bonneville, 93-02 Firebird, 05-06 G6, 02-05 Grand Am, 97-08 Grand Prix, 02-06 Montana, 06-09 Torrent; SATURN: 05-06 Relay