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1280 Views 7 Replies 6 Participants Last post by  RSX TYPE-S 916
Im just wondering what size piping is the best for top end.
Is it 2 1/4 or 2 1/2
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lOOkatme said:
doesn't the stock piping come with 2 1/4???

yup but 2.5" diameter piping and aftermarket muffler of your choice will benefit your car to a degree.
also it could depend on how deep in tho modifying process he is!...Eg..cams!
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