Apparently my car came with heat shields for the wire boots along the rear manifold. I went to install some NGK TR6 plugs today and decided to start with the hard part first (the rear plugs) and was frustrated with no knowledge of how to remove these. Anyone? I'm not sure if they twist off, pull off, or break off. :?

Take a look:

Looks exactly like what'* on my car, they pull off like normal.

They pull off.
You have to use a lot of force but it helps to use something to pry them off from the bottom....to break the seal.
They use a spring on the inside to hold them tight.

Wear your gloves and be careful.

There'* supposed to a be spring in there? Crazy, mine'* just a metal cylinder....

Yes there is a spring in there.
And good advise to wear gloves, I scratched my hand smashing the firewall when it finally let go
Helps to give it a twist while pulling.

yea mine had that thing on them too its just a metal cylinder i didnt see any springs....i guess for heat protection you just have to pull it off with the boot

now that i look at your pic you should probably change out the wires too...i had those same wires on my car when i changed them last weekend....think they are the originals??

They have springs originally. Someone may have tossed y'all'* on a previous change.

And, along with gloves, have plenty of cuss words handy. You'll need 'em.....

mine weren't horrible - twist, pull.

i've worked on a 99 bonnie with original plugs/wires, and it didn't have springs, but my 96 lesabre did...

My 99 SSEi, 99 GP and my dads 96 Ultra have the springs.

Jay