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This is my first post, i have a 84 with a 302 v8 and was wondering if anyone has used heddman headers on this engine, and what size pipe should i run? i am going to be running true dual from the headers and didnt know to use 2.25 or 2.5 inch pipe. what i have now is 2" pipe.
 

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I would run a 2.25 if leaving it standard and a 2.5 if mild and 3 if wild. The header primary and secondary pipe size is a factor as well.
 

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I always use 2 1/2 inch pipe for a small block car..Always...
 
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