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Stupid spark plug question

Old Jan 9, 2008 | 04:11 PM
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What plugs came from teh factory in 2001?

I bought my vert used and am in the process of doing heads & Cam. Pulled the plugs and they are DENSOs. Were theses stock? They look like sh#@. Just curious
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Old Jan 9, 2008 | 04:16 PM
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Probably the Delco Iridiums-look in the owners manual.
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Old Jan 9, 2008 | 04:30 PM
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No way densos were stock. Denso makes good, but expensive plugs. The Iridiums are almost $6 apiece.
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Old Jan 9, 2008 | 04:54 PM
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Originally Posted by LDB C5
What plugs came from teh factory in 2001?

I bought my vert used and am in the process of doing heads & Cam. Pulled the plugs and they are DENSOs. Were theses stock? They look like sh#@. Just curious
It's in your service manual under:Chapter 6, Engine Electrical Specifications
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Old Jan 9, 2008 | 05:46 PM
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Do yourself a favor and go to your local parts store and get some NGK TR55's. They may not last as long as the expensive stock plugs but at under 2 bucks apiece who cares! I like copper plugs better than the iridium/platinum ones and since my car is not a DD, longevity is not an issue.

Jimbo
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Old Jan 9, 2008 | 05:48 PM
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Originally Posted by ZZOOM06
Do yourself a favor and go to your local parts store and get some NGK TR55's. They may not last as long as the expensive stock plugs but at under 2 bucks apiece who cares! I like copper plugs better than the iridium/platinum ones and since my car is not a DD, longevity is not an issue.

Jimbo
Alread did that

Thanks for the replys !
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Old Jan 9, 2008 | 08:05 PM
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I just replaced the original plugs on my '01 coupe last weekend and they were Densos. After 46k miles they were toast. I put in new Bosch platinums (nobody had the NGKs in stock) and it made a very noticable difference in power and smoothness over the dirty orignal plugs. I think the condition of the plugs is alot more important than what type or brand they are.
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