how much hp the stock piping & exhaust can hold

header,stock exhaust,stock piping

do you think it could 140hp+ b18a1 ,intake ,header 4-2-1, stock exhaust, stock piping

without sacrificing power

 

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I just ripped the old exhaust off my dx and the piping is really skinny, my thermal 2.25 inch is huge compared to it. I think it would seriously hamper hp.

 

uhh stock piping usualy reduces your stock motors hp so im asuming id would do the same on a swapped motor. it doesnt really have an hp limit. you could have a 129560891462589641856483 hp motor and prolly get half that out of stock piping. its all reitive to howmuch hp you have

 

you need at least 2 inch, AT least,
the stock piping is a HP sucker, believe me, especially if you run on nitrous or boost,
see ya