Denso plug come pre-gapped and ready to install (after you add a dab of anti-seize to the threads, of course). Just like about everything else under your hood, Toyota engineered your truck to run it's best using OE parts. Gimmicky aftermarket spark plugs are a waste of your hard earned coin. Replace your plugs with these Denso units and rest easy knowing you did the right thing and installed the best. Now, pat yourself on the back for making the right call.