Pipe size

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Alhasawi

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Could anyone tell me which is better to put 3” pipe or 3.5” pipe for cat back
I have a factory here and they are welling to make both as i want as the owner recommended the 3.5” but as i see in the market most are 3” pipes
Anyone have any ideas and whats the difference and benefits please
 

Gary E

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Could anyone tell me which is better to put 3” pipe or 3.5” pipe for cat back
I have a factory here and they are welling to make both as i want as the owner recommended the 3.5” but as i see in the market most are 3” pipes
Anyone have any ideas and whats the difference and benefits please

Actually, neither if true dual exhaust is being installed. The head pipes from the exhaust manifolds are 2.5". That size is sufficient for a true dual exhaust on stock 6.2 engine. For those that are staying with the stock 2 into 1 Y pipe system or close there of, the stock 2.5" head pipes go into a 3.5" Y pipe, then gets necked down to 3" at the resonator.
 
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