Spark Plug Help
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Intermediate
Joined: Feb 2005
Posts: 37
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Spark Plug Help
I'm doing my long awaited tune up on my LT4 and I had a few questions. I'm not going with platinum plugs so I bought some NGK's. I asked for the TR55 plug but they gave me the TR5. The NGK website says the TR55 is the stock replacement but when I looked at the specs on each plug, it appears that only the gap is different. Will the TR5 plugs work or do I really need to get the TR55?
Team Owner
Joined: Oct 2000
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From: Fort Knox, KY
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The TR55 IS a platinum plug. That's what I put in my '92. I don't know what the copper plug model number is.
Race Director
Joined: Jan 2002
Posts: 12,261
Likes: 85
From: O'Fallon Missouri
Originally Posted by onedef92
The TR55 IS a platinum plug. That's what I put in my '92. I don't know what the copper plug model number is.
Race Director
Joined: May 2001
Posts: 14,165
Likes: 9
Originally Posted by onedef92
The TR55 IS a platinum plug. That's what I put in my '92. I don't know what the copper plug model number is.
Burning Brakes
Joined: Apr 2000
Posts: 980
Likes: 2
From: Chandler AZ
What about the seat???
I had TR55's in my car. I was concerned about the seat design. The original plugs have a taper seat and the TR55's have a flat seat with a sealing washer. I went back to AC's.
