Originally Posted by TheSam Define a 'stock' muffler it would still have to be 3" inside so would still be loud.
The exact muffler that came on all B13's from the factory which was very quiet. With a 3" inlet for the piping and a regular size outlet (2 inches or whatever it is)
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Jordan
‘20 Mazda MX-5, ‘20 Toyota Prime, ‘19 Subaru WRX Music - - My SR20 website