BMW E90 E91 E92 E93 335i N54 K&N 57S-2003 Cold Air Intake

Direct-fit cold air intake for the BMW E90, E91, E92 and E93 335i with the N54 engine - no cutting, no coding, no compromises. Designed for fast-road and track-day use, it sharpens throttle response and adds a richer, more purposeful induction note.

• K&N 57S-2003 - full kit including washable cotton gauze filter, silicone couplers and hardware
• Retains OEM mass airflow sensor and mounting points; fits all N54-powered 335i, 335i xDrive and 335xi (2006-2013)
• Filter serviceable up to 100,000 miles - no replacement filters needed for years
• Proven airflow gains without triggering check-engine lights or requiring remapping