spasquini

I have the stock wire on the car with about 64k miles on them. I also have NGK TR55 Iridium plugs that have 20k miles on them. I am installing PRC 5.3l Stage 2.5 heads and and am wondering if I should change them out or not. I saw a few postings talking about a colder plug. Let me know your opinoins.

Thanks,
Steve

tylerdj

iTrader: (31)

No need for a colder plug if you're n/a. I would go ahead and change the plugs while you have it torn down, they're cheap anyways. If you're looking at different wires I've always ran the Taylor 8mm wires and have had no problems with them, and MSD makes good wires too.

Datzneat

iTrader: (4)

MSD fanboy here. No spray? Don't worry about the colder plugs. O and i agree with tylerdj. Switch em out now.

snake charmer

iTrader: (118)

msd is all good . go ahead and do the plug swap .
correct me if i am wrong but depending on your compression and power would a colder plug be called for ? you say you are putting on some heads got any more info on them ? milled any ?

Z28/2002

iTrader: (27)

Yes depending on CR you might want to run a colder plug. I ran TR6s in both my cam only Z28 and H/C TA