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Old Feb 6, 2006 | 02:22 PM
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I am just wondering what plugs to run in my 98 T/A. i am doing longtubes and true duals, and then getting it tuned. i hear alot about NGK TR-55's but i didnt think that they were a platinum plug, and that was standard on the car from the factory, at least i think it was. cause there was an NGK TR-55IR also, and then one other model when i was at Advanced Autoparts. i just wanted to know what i should run in the car. thanks!
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Old Feb 6, 2006 | 02:58 PM
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I think the majority of responses will be for the TR-55's. I do not think your mods would warrant anything different.

You'll like them, just not the install

I have them in mine, second set.
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Old Feb 6, 2006 | 04:09 PM
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i thought iridiums were factory i belive the scdelcos are iridium from what i seen
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Old Feb 6, 2006 | 04:11 PM
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A NGK TR-55IR Is an Iridium plug, which would actually be better than A platinum plug if you dont mind forkng over the cash for them.
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Old Feb 6, 2006 | 06:46 PM
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Standard NGK TR55s are perfect, nothing else is needed for your setup.

I've used the basic TR55s gapped at .055" in both my cammed WS6 and bolt-on Z28, works great.
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Old Feb 6, 2006 | 11:23 PM
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I had a set of TR55's in my '95 and they worked great.
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