infierno

I just wanted to get ya'lls opinion upon which spark plugs i should use. I'm tryin to decide whether it's worth it to spend a little extra cash and go with the iridium spark plugs or just go with copper. Which would ya'll recommend based upon the mods in my sig?

86 5.0L

Autolite Coppers

primetime5.0

just a copper plug would work best 3924's maybe?

92GreyGT

3924 Autolites with the TF TW heads.

67mustang302

Copper Autolites FTW.

PRO50SC

Don't waste your money on high dollar plugs, not worth it.

MADMAC

When I purchased my stang 3 years ago it came with the Denso Iridium plugs. I have had no problems with them at all. I pulled them a few weeks ago to see if I needed to replace them, they still look just as good as new. "They are very expensive." If I had to replace them I would go along with the other guys in this thread unless you had the money to throw away.

I would consider putting them in my F150 5.4 because those plugs are a bear to replace.

infierno

what gap would ya'll recommend running the autolites at? all i have upgraded in the ignition is a tfi blaster coil

86 5.0L

oh crap didnt see he had TF heads, yeah not #25s[&:]