MagnaFlow vs. Berk Technology vs BMW performance
MagnaFlow vs. Berk Technology vs BMW performance
i have a 08 135i only have downpipes changed. it has a catless downpipes and im looking to change my stock exhaust and i need some help.
which exhaust sounds better? which one do you recommend? Whats the pros and cons?
please help it will mean a lot
Thanks
|