Brand-new genuine ACDelco R43TS spark plug. This spark plug features one heat range colder than the R44TS factory installed spark plugs.
This plug is designed to dissipate heat faster which reduces the center electrode temperature in order to eliminate detonation on modified engines applications running under higher boost and RPM levels.
This genuine ACDelco part will ship in its original box as pictured.
Recommended gap = 0.035"
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As described Highway Stars is always perfect.