Pulled 8 of these out of Tundra in signature. LFR6A11 NGK Iridium 4s. Plugs I matched up with Rock Auto has on the box LFR6T11. So the Iridium 4s in my manual say they go in the 4.7L... I have the ones from Rock Auto in the truck. Other plugs thrown no codes though. Much beefier now with throttle, shifts better for some reason through the tranny, mpgs is better already. Picture is the old plug I removed. Mind boggling... SMH
Ps. 3 of the plugs felt like they were only finger tight when I pulled them out. Put almost zero pressure on the ratchet.
Ps. 3 of the plugs felt like they were only finger tight when I pulled them out. Put almost zero pressure on the ratchet.
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