Bosch Double Iridium Spark Plugs 96321 YR7SII33X 4-pack

New Bosch Double Iridium spark plugs. Box has 4 spark plugs. OE fine wire spark plug has 4X longer service life. OE replacement. Satisfaction 7 years guaranteed. Unique iridium alloy provides exceptional ignitability and performance. Double iridium firing pin and ground electrode inlay has 4X longer service life. 0.6mm fine wire firing pin has better ignitability and durability. Exclusive Bosch laser welding processes with 360 continuous laser weld fuses corrosion-resistant precious metal firing pin to base. Provides superior retention of iridium alloy pin to ground electrode.