Dinan Cold Air Intake - BMW G29 Z4 sDrive30i

The stock intake on the G29 Z4 sDrive30i prioritizes noise attenuation over airflow — the right call for BMW's general market, but one that leaves measurable performance unrealized. Dinan's cold air intake reroutes the intake charge away from engine heat and into cooler, denser air from the front of the engine bay, reducing the charge temperature rise that gradually degrades power output as underhood temperatures climb during a performance drive.

The system uses a high-flow intake tube and performance filter to increase volumetric efficiency on the B48 engine, unlocking additional power across the mid to top RPM range. The cold air positioning compounds the gain beyond what a drop-in filter alone can achieve — both reduced restriction and lower charge temperatures work together to improve density at the throttle body.