View Single Post
      08-28-2018, 01:43 PM   #4
Longboarder
Major General
Longboarder's Avatar
3431
Rep
6,771
Posts

Drives: 2016 BMW i8
Join Date: Dec 2006
Location: Monarch Beach

iTrader: (1)

Garage List
Quote:
Originally Posted by SFCM3 View Post
Just run test pipes, have a competant exhaust shop add a flange to the back of the pipe, and to the back of the primary cats after cutting them off. that way you can swap out the test pipes on track days. seems to be the only solution it you want oem sound levels outside the track...
That's interesting...didn't know the primary cats could be swapped out for a track day.

There's another thread in here that I was reading that says it can't be done (once the primaries are removed they cannot be reinstalled).
__________________
Current BMWs: 2022 X5 40i, 2016 X5 50i
2015 Porsche 991 Turbo S
1979 Porsche 911 Turbo (930)
a couple others
IG: longboarder949; YouTube: https://www.youtube.com/channel/UCT1...eoFBszPIK0gf9w
Appreciate 0