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NGK TR55's

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Old Sep 5, 2005 | 08:54 PM
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Default NGK TR55's
Are NGK TR55's the correct plug for a 91 L98?
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Old Sep 5, 2005 | 09:11 PM
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Maybe this link will help
http://www.sparkplugs.com/default.asp
This goes right to 1991 vette
http://www.sparkplugs.com/results_ap...1&AAIA=1041286
Hope that helps some.
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Old Sep 5, 2005 | 09:13 PM
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Originally Posted by neat
Are NGK TR55's the correct plug for a 91 L98?
I used the TR55's in my stock LT4, they are a good plug. I have TR6's now with the 383.
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Old Sep 5, 2005 | 09:58 PM
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That link is great, but it doesn't list NGK TR55's. Is that an all inclusive list?

Zix, thanks for the input, but I'm not sure L98 and LT1 spark plugs are interchangebale. Are they?
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Old Sep 5, 2005 | 10:28 PM
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Originally Posted by neat
That link is great, but it doesn't list NGK TR55's. Is that an all inclusive list?

Zix, thanks for the input, but I'm not sure L98 and LT1 spark plugs are interchangebale. Are they?
for aluminum headed L98's (which your is), yes they are interchangeable
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Old Sep 5, 2005 | 10:32 PM
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Originally Posted by neat
Are NGK TR55's the correct plug for a 91 L98?
NGK lists L98 1990-91 as FR4 or FR4GP they have an iridium also, I believe it is a UR4 (forgot the rest sorry) I hope this helps m7
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Old Sep 6, 2005 | 12:18 AM
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I wonder what the difference between an NGK TR55 and the FR4 is? Anyone know?
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Old Sep 6, 2005 | 08:33 AM
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I'm using the TR55 in my 383 (LT1) and like them a lot. Mine are gapped to .035, btw.

Mike
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Old Sep 6, 2005 | 08:49 AM
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I have the NGK TR-55 platinums in my LT1 and have been extremely pleased with them. I set mine at the stock gap.
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Old Sep 6, 2005 | 09:01 AM
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NGK is the only plug ill ever use
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