Stevens91gt

well i decided to try the E3 spark plugs
and i bought the ones for a 91gt but
i have a gt-40 engine[&:] so i was wondering
if i just buy spark plugs for a 96-2001 5.0 explorer because those had gt-40's correct?
i tried the ones for the mustang, my car, and they didn't fit because
there was not enough threading

Does Not Exist

I'm guessing since the plugs you bought didn't fit it'd probably be a good idea to get the other ones....just a hunch I have.[8D]

Stevens91gt

haha that's what i thought
but i didn't want to do something completely wrong
haha [8D] thanks

Does Not Exist

I have no idea which plugs you'll need. I'm just going by the scientific method of elimination.[8D]

Stevens91gt

haha i'm not taking science in college[8D]

projectresto83

Yes you need the plugs for whatever the heads came off of. Not for a mustang. If they are for regular GT40 heads you can use the 93 Cobra but make sure they list them with the right head. I have seen some things for the Cobra be listed saying it has a E7 head.

Stevens91gt

i put them in today
i got the 96-01 explorer plugs
and they are great
the idle is just perfect
i like these E3's
a little expensive but worth it imo