Bosch WR91X Spark Plugs Super 4 Set of

Plugs easy to replace: factory-pre-set electrode gap, no adjustment necessary: Bosch advices not to lubricate the thread : Requested tightening torque or angle see on package High reliability: outstanding protection against carbon fouling due to surface air-gap technology High wear resistance and robustness: special ceramic material with high dielectric and mechanical strength Supports an optimum engine performance: smooth engine operation and steady acceleration Corrosion protection: outstanding engine protection due to anti-seize nickel-plated housing and thread Please use the vehicle identification to confirm compatibility with your vehicle : all restrictions must be observed.