Review: Stock F80 M3/M4 exhaust w/ Custom Midpipe Setup

[M3Teg]

Originally Posted by gatorfast

Just so I understand, you are saying it's much louder with the valves closed upon startup? That's what I figured.

no, let me clarify. my exhaust mod with valve open is going to be the loudest on startup, if u go this route.

[Henry655]

Interesting thoughts on set-ups

I am going for catless dp's and a tune, and would like to have the car sounding a bit deeper/more aggressive than standard, but not tiresome when cruising along with the roof down.

Currently considering:

Catless DP's >>> Straight pipe >>> high-flow mid muffler >>> Stock back box set-up + valve controller to allow permanent close/permanent open of valves

Do the secondary cats have much of a purpose if the primary cats are removed?

[AWCGROUP]

Originally Posted by kitesurfer

Has anyone tried just cutting out the secondary cats and leaving the resonator...thinking that would cutdown on the rasp? If so please up a video

I did.