Ok I bought a set of NGK SPARK PLUGS PART #(BKR6E) FOR A B16 which ive heard that these r lil bit hotter plug than BKR5E any ways i know that they come pre gapped for factory 1.1 or something the BKR6e r gapped closer then factory. Should i gap the BKR6E to the factory specification or should I leave it alone??????????????