[quenotte]

Originally Posted by S2000_Europe

Does that opening make a such a difference? I think the ASD or Exhaust noise will overlap the duct noise.

Hose to the firewall is this one, you can really hear the engine breath, one yo change to an aftermarket exhaust, is inaudible

You can trust me, duct noise of red opening was not overlapped by ASD/Exhaust

You can definitely hear more intake/turbo sound with this red opening and think that it push harder

I had a HJS 300 Cell DP + M Perf exhaust so not the most "silent" M235i

[omasou]

I was about to add the M3/M4 airbox intake ducts to my M2C and noticed the air ducts to radiator (51748073523) on my US car is two pcs and would require cutting through the clips that secure the two ends together,

https://f87.bimmerpost.com/forums/at...1&d=1571909832

BMW M3/M4 intake ducts
- Intake duct, left (13717613157)
- Intake duct, right (13717613156)
- Intake grill x2 (13718507321)

The M3/M4 air ducts to radiator looks different so I don't think I can use that part.

My question is...outside of the US do the M2C cars have an air ducts to radiator (part #1) that looks like the one pictured here w/precut holes and if yes do you happen to know the part number? I'm afraid if I order 51748073523 it will arrive w/o the precut holes.

[Supadice]

I just installed a AWE intake and part 11 was getting in the way on Passenger side. I removed it, is there any downside since it connected to zero

[bmwstephen]

Can anyone confirm if n55 ogs have this issue?