EDIT: Dynos of the intake available here:
http://www.e90post.com/forums/showthread.php?t=486828
EDIT: Installed including the cold air snorkel in the brake duct
It's ideal, it gets the coldest air possible. More pictures posted below.
EDIT: Installed ! Posted some install pictures below.
Parts needed:
- stock airbox
- K&N Apollo cold air intake (includes cold air feed hose with velocity stack and adapter to the intake box). It costs $127 online.
- custom CNC machined 2.75" OD intake flange
- 2 x 2.75" 90 degrees silicone couplers
- 1 silicone joiner
- 4 hose clamps
- Custom rubber gasket for the intake flange
- K&N air filter sealing grease (to properly seal the gasket to the intake flange and airbox)
- 2.75" hole saw and power drill
- Injen power steering relocation bracket to make room for the K&N Apollo filter (I think it may work without it but I am not sure)