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Superdak05, I know they work well in the 4.7L HO, but how well do they work in the non-HO? Do you loose any low-end torque?
They work well in the 4.7, no noticeable loss from them, in fact the truck runs smoother and generally seems to perform a little better with them. I have the normal 4.7 and that's what I run.
Went to WalMart and picked up some 3923's...wow buddy. That thing sounded great when I started her up. Those really cheapo plugs in it before made the "missing" problem a tad bit worse. But the 3923s are fantastic.