C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
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Old Mar 13, 2026 | 03:26 PM
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Info please - will Doug’s D350 ceramic long tube headers have a good fitment on AFR 180cc 64cc combustion chamber? Doug’s header flanges are oval and AFR exhaust ports are square. Thanks for anyone’s thoughts. Best wishes and have GREAT weekend! pappy
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Old Mar 14, 2026 | 11:48 AM
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Originally Posted by pappy6062
Info please - will Doug’s D350 ceramic long tube headers have a good fitment on AFR 180cc 64cc combustion chamber? Doug’s header flanges are oval and AFR exhaust ports are square. Thanks for anyone’s thoughts. Best wishes and have GREAT weekend! pappy
The gasket is oval. So as long as the square port on the head isn't larger than the gasket it works.
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Old Mar 14, 2026 | 02:19 PM
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Originally Posted by MelWff
The gasket is oval. So as long as the square port on the head isn't larger than the gasket it works.

Thank-you for your thoughts. I thought they would work! pappy
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