K&N Custom Racing Air Filter - Rectangular Carbon Fiber 4in Air Box w/ 2.75in Air Horn 2024-bmw-m235i-xdrive-gran-coupe-esi9039219 Vacuum/Boost reference capability

Vacuum/Boost reference capability

For each vehicle our engineers develop a specific damper setup and spring rate to increase the driving pleasure with an optimal balance of sportiness and practicality

This ensures the fitting surface will not be damaged during the assembly process

not 'cast'

SuperPro's differential mount upgrades maintain OEM levels of noise

K&N Custom Racing Air Filter - Rectangular Carbon Fiber 4in Air Box w/ 2.75in Air Horn 2024-bmw-m235i-xdrive-gran-coupe-esi9039219 Vacuum/Boost reference capabilityLight weight yet durable, K&N's Generation 2 Carbon Fiber Air Boxes are a must for any racer currently using traditional multi Siamese stacks. Constructed from ultra lightweight carbon fiber these filters provide ample air flow for your racing needs. They come with air horn seals to provide better sealing and easy installation. As with all K&N air filters, Generation 2 Carbon Fiber Air Boxes are washable and reusable. Simply use K&N cleaner and oil to