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Make sure it's medical grade nitrious. It's more utilitarian at that point. After you crash your car you can whiff it up and you won't feel so bad.

Any free flow exhaust is good for nitrious 2.5" piping is supposedly best. 2.5 is also louder than 2.25 IMO
 

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Discussion Starter · #5 ·
how sure r u about nismo being 2.4 because i was told it wa 2.25, and i could have sworn i saw it on some website as being 2.25.
 
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