K&N Performance Air Intake System (57-3081) BMW > 4 Series > F32/F33/F36 Improve stance and wheel fitment

Improve stance and wheel fitment of the Mercedes-Benz SLK with Perfco Performance Premium Wheel Spacers

and performance in one go

which enables fitment of this recirculating valve option onto the B7 and B8 chassis whereas this was previously not an option

These tests took place in relatively cold conditions with an ambient dyno cell temperature of 15°C proving how inefficient the stock intercooler is

High wear resistance for consistent braking power over time

K&N Performance Air Intake System (57-3081) BMW > 4 Series > F32/F33/F36 Improve stance and wheel fitmentA high density polyethylene (HDPE) rotationally molded tube helps increase the volume of airflow to your engine, and provides a guaranteed increase in horsepower and torque. These systems are paired with a washable, reusable High Flow Air Filter featuring oiled cotton filter media. The oversized, conical design allows you to go up to 100,000 miles between filter services under normal highway driving conditions. A custom heat shield helps protect