Jeep Grand Cherokee 4WD WJ, WG Laredo, Limited 162kw 4.7L V8 SOHC EVA 6/99-05. Jeep Grand Cherokee 4WD WH Laredo, Limited 170kw 4.7L V8 SOHC EVA 6/05-07 with 19mm Reach. Tri-Power iridium Spark plugs are manufactured and tested to the highest OEM approved quality standards.