C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Strait plug heads on L98?

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Old Aug 1, 2019 | 04:51 PM
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Brent Scott
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Default Strait plug heads on L98?

Anyone run strait plug heads on L98 without having spark plug clearance issues on headers?

Thanks!
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Old Aug 1, 2019 | 08:16 PM
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Originally Posted by Brent Scott
Anyone run strait plug heads on L98 without having spark plug clearance issues on headers?

Thanks!
I'm running straight plug heads and ARH headers. Absolutely no clearance problems.


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Old Aug 3, 2019 | 10:26 PM
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Heddman's cheap steel ones will have interference issues. Fixed it on my friends '91 with a hammer and a socket with a little heat. No experience with higher end units.
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Old Aug 3, 2019 | 10:45 PM
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I don't have issues on my headers but there are many brands out there. Some you have to bang it up to comply, some you don't. How cheap is your header?
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Old Aug 4, 2019 | 06:11 PM
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Thanks for info!

I currently have Dart 180cc angled plug heads and there a real pain on the passenger side to change plugs.

I have some decent decent generic aftermarket heads that are straight plug with similar flow numbers to my darts.

I just didn't want to make the swap if they still have interference problems.

Thanks again for the input!
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Old Aug 5, 2019 | 08:28 AM
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For easy access to RS plugs remove the rear plastic inner wheel house (5 min) then use an extension & swivel plug socket.
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