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Berk front pipe w/ HFC:
[ame="https://www.youtube.com/watch?v=J2LGLH7K1Cs"]Berk HFC front pipe Scion FRS Subaru BRZ exhaust sound clip - YouTube[/ame]
I never got around to testing a car with a non-resonated, no-cat front pipe, but you can imagine it to be louder than this.
A word of warning: you'll have more rasp out of the stock exhaust if you only replace the front pipe. Baffle-type muffler designs don't like certain exhaust frequencies that show up when you remove resonators in the system.
-alex
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