Okay....the backboxes are starting to corrode and be much much louder....so i have to replace the backboxes and possibly the the center silencer and tubes.....so I have narrowed down the replacement options to either the SuperpSprint or Eisenmann backboxes.....
I've seen loads of your posts on the exhaust on the topic but it still isnt clear to me which is better for an M Z4.....so what I'd to know is which from your perspective is better quality? and which would you recommend for a Z4M coupe?
thanks...
I've seen loads of your posts on the exhaust on the topic but it still isnt clear to me which is better for an M Z4.....so what I'd to know is which from your perspective is better quality? and which would you recommend for a Z4M coupe?
thanks...