Grumman Traveler and Cheetah AA5 above s/n 641 & AA5-A (O-320), AA5 below s/n below 641 (O-320), Tiger AA5B & AG5B (O-360).

General Magazine Reviews on the Power Flow Tuned Exhaust

• “…Power Flow systems offer among the best bang for buck of any mods we’ve reviewed.” – The Aviation Consumer – Feb. 2009

• “There’s very little available on the aftermarket these days providing the same return rate on investment.” – The Aviation Consumer – Feb. 2009

• “…we are convinced they have a well engineered product and they have made reasonable performance claims.” – Light Plane Maintenance – Sept. 2008

• “…the company’s money back guarantee almost makes it a no-brainer to give it a try.” – The Aviation Consumer – Feb. 2009

• “I’m not a test pilot but… even I could tell there was a difference. It was that obvious.” -Flying Magazine, August 1999

• "Although it’s not free, Power Flow has created the closest thing to free horsepower that we’ve seen.” AOPA Pilot, January 2000

• “A rate-of-climb increase of about 20 percent is remarkable – not to mention the safety factor increase when leaving high-altitude airports or climbing through cloud layers.” -Private Pilot Magazine, December 2000 (click to read)

• “…boosts the Lycoming O-320’s output by at least 20HP, while simultaneously reducing fuel flow and lowering CHT’s. Geez, what a deal.” -The Aviation Consumer, May 1999

• “At the conclusion of the flights, there was no questions that the PFS had improved both climb and cruise performance.”  -Plane & Pilot, December 2006. (M20 200hp)

• “Upon opening the large boxes, I was immediately impressed.” -Cessna Owner Magazine, September 2002.

• “This is a quantum leap in climb performance.” -Cessna Pilots Association Magazine, August 1999

• “In the aircraft industry, you see many “mods” claiming incredible changes to performance.  It is refreshing to see one that actually lives up to its performance claims.”  -Cessna Owner Magazine, September 2002.

• “The engine gets a more complete fuel burn.  The effect in the cockpit is that it will take less throttle to get the same RPM”  -Aircraft Maintenance Technology Magazine, March 2005