1LE Hugger Orange

I am installing headers on my LS1 , I thought that it would be a good time to change the plugs . What should I buy ?

N20zuki

More info would help.

bane89

iTrader: (3)

I used some ngk tr-55... No isses here and there less than $20

But if you're gonna squeeze then you should use some colder plugs.

conan

iTrader: (5)

NGK TR-55's for N/A application.

RPM WS6

iTrader: (3)

Lots of options, depending on priorities (cost vs. longevity of plug) and application (colder, hotter)

NGK TR55s will work just as well as any of the fancy platinum or iridium tipped plugs at considerably less cost, but the trade-off is that they won't last as long. As far as heat range goes, that will be application dependent, but if the engine is anywhere between stock and full bolt-on level, the TR55s are a sure bet.

Chris25

iTrader: (1)

NGK TR55s here never had an issue with them.

1LE Hugger Orange

I am changing the cam , does that change what kind of plugs?

Robert Cantu

iTrader: (2)

Nope the NGK TR55 are good for up to a full built HCI car. Run nitrous then need some colder plugs.

1LE Hugger Orange

Hi , I spoke to a rep from NGK and he recommended the tr7lx , Iridium lx as he thought with the g5x3 cam and kooks headers I should go with a colder than stock plug .

RPM WS6

iTrader: (3)

I have always used stock heat range even with a cam/header car. I know some people use the colder plugs for more aggressive NA setups, but I never did and never had any issues.

conan

iTrader: (5)

What RPM said ^^^

To add,
I ran TR55's when I was full bolt on and cam, never had any problems as well. Now I'm running TR6's on 8#'s of boost at 600+ hp, plugs never show signs of being to hot. Most people I see running a #7 range plug are 750-800+ hp cars, with a lot of boost. you'll be just fine on a #5 heat range plug.

Drag0

Definitely tr55. They are fairly cheap and good, just make sure you gap the correctly