[WhatsADSM]

Originally Posted by AndyW

They are pricey, but I wonder if these will work on the 135 also, so you can effectively use 3" ducting?

http://www.hardmotorsport.com/hard-m...-duct-bmw-e9x/

Where that would actually mount to? How is it collecting air exactly? Also FWIW while the outlets may be 3" I can't imagine that flows any better than a 2" or 2.5" pipe just based on design, it necks down considerably and looks like it flows into a pretty nasty 180 degree "turn".

FWIW I'm trying to get through some more testing of my duct solution and once I do I will sell my primary ducts for cheaper than that as well.