Exhaust port diameter size
05-27-2004, 04:45 PM
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Exhaust port diameter size What is the exhaust port diameter of a stock LS1 head? I'm trying to figure if a 1 1/2" header size is less than the stock port size. Thanks
05-28-2004, 01:14 AM
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Nah, I don't want that small a pipe size. Its just that the Hedman Tech guys said that their header is stepped from a 1 1/2 to 1 5/8". I'm thinking that they are wrong. 1 1/2 pipe inside diameter is around 1 3/8", that is SMALL! So, if the stock port size was bigger than 1 3/8", then it wouldn'y make any sense that they would size their header that small. Anyway, thanks for your reply.
