As your mileage increases, so does the wear on your vehicle components. The air filter will get plugged, the oxygen sensors start to fail, and your spark plugs will need changed. With these components starting to fail, your gas mileage and performance will diminish.
ECS Tuning has created a very comprehensive kit to combat this problem. We have covered every aspect to make sure your M3 has the raw power and efficiency it should.
The kit includes:
