【 DT44 】 DUAL IRIDIUM SPARK PLUG BUICK GL8 ES GL8 2.0T ENCORE ENCORE GX 1.3T ENCORE FLAG 2.0T ENCORE PLUS 1.5/2.0T REGAL/LACROSSE 2.0T VERANO GS 1.3T VERANO PRO 1.5T CADILLAC CT4/CT5/CT6/XT4/XT5/XT6 2.0T KEMULE 2.0T CHEVROLET GENESIS/COOLPAD/MALIBU XL 1.3T TRAILBLAZER/EXPLORER 2.0T