I would probably just go to a local exhaust shop and have them add the resonators. coz really its an easy thing to do and you can choose what brand you want, magnaflow, vibrant ultra quite ect.
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135i N54 manual
MR-S with a 2zz swap and mods Sold
EVO X MR - Phantom Black - Ti Exhaust - Ti UICP - AQM Intake - Sold
Z4 M Coupe - H&R - RE Diablo - RPi - Tekarbon - Sold
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