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i just got my t25 and i am going to install in about a month, i just need a little help deciding what exhaust to put on, or if i should just get 3 in or 2 3\4 in piping then get a muffler
 

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Veritas
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3" from the downpipe back. If you have to pass emissions tests, then get a Catco converter. Add in at least one (two would be sweet) resonator mufflers, like the Dynomax Bullet series, then to a muffler of your choice at the bumper.
 

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i have a 3" turbo back w/ catco cat, 24" dynomax bullet resonator, and magnaflow muff and i love it.. quiet at idle, looks sleeper, doesn't drone, an wot isn't that bad either..
 
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