Leading Edge Exhaust Systems holds several FAA supplemental type certificates for its Power Monster Cross-Flow system for the Cessna 180, 182, 185, and 205/210, plus the Piper PA-18 Super Cub and ...

fuel flow. A tuned exhaust system, developed by Power Flow Systems, is now approved for installation on the Piper Cherokee 140 and on Cessna 172s equipped with 180-horsepower engines.