Best Replacement Plugs EcoBoost
#11
Wanted see if I could notice any difference; which of course I can't feel any difference. The only thing I can tell is different is the box they came in. The 534's say iridium on the box; the 528's don't
#12
#16
Senior Member
#17
Senior Member
That soon? Glad I asked. I'll get some of the new NGK SP-534's and try those out. Thanks a bunch.
#18
Senior Member
Those plugs will work fine Tyler. Just remember .030" gap and torque plugs to 11 ft lbs. Any more you'll crack the insulation on the plug and render it useless.
#20
534 - iridium tipped
Especially if tuned, you'd want iridium tipped. Platinum tipped can blow out under high boost.
I thought it was 11in/lb which is just past finger tight.