Looking for some opinions as this is my first mod ever, first mod on my new-ish X3M Comp.
Main task: Deciding on a set of downpipes
Possible downpipes:
- Evolution Racewerks Catted
- Project Gamma Catted
Possible catless:
- Evolution Racewerks
- HCP+BM3+Project gamma collab downpipes (Found here:
https://www.bm3tuning.com/bmw-f9x/s58-catless-downpipes)
Things i would like to know if anyone has info.
- In NYC having catless would mean 2 things: fume smell in the cabin in my dd, and i would have issues with passing inspections, is this correct?
- Catted vs Catless there is not huge performance gain from what i have seen, am i wrong?
- Should i get thermal coating? i am not going to track this, DPs are just for added fun getting groceries and rides to dinner.
- Would High flow catted downpipes still be loud and provide a nice performance boost on a stage2 bm3 or f80 tune?
- How much would the install on these downpipes be in NYC? Any ideas or quotes from anyone...