This is a great performance upgrade combo for your Sidekick or Tracker. The complete kit includes our 2" aluminized steel mandrel bent performance exhaust system and the CALMINI drop in replacement filter. Expect gains of 10-12% with the installation of this system as well as increased fuel mileage due to a more free flowing filter and exhaust kit. This is a must have system for 'Kicks with off-road tires and rockcrawling accessories. Complete kit is entirely bolt-on and easy to install.