Glastar/Sportsman 2+2 Angle Valve

Bolt on Horsepower: Power Flow offers you a complete, high performance replacement of the standard Glastar & Sportsman exhaust system. This kit fits Lycoming’s Angle Valve I/O-360 and I/O-390 engines.

Product Brochure - Click here to download 

In addition to the Glastar/Sportsman airframes, this non-STC’d kit fits and works just fine on several other popular custom built and kit aircraft powered by Lycoming’s Angle Valve I/O-360 and I/O-390 engines. 

While our ability to test and support the installation of our system on individual airframes is, of course, limited in most cases you can expect the following performance improvements from a Tuned Exhaust System compared to a legacy “Accumulator” style exhaust

• An increase of 30 – 130 rpm in static thrust

• A take-off roll that is 100’ to 300’ shorter

• An improvement in the aircraft’s rate of climb by 100 – 150 fpm

• CHT’s that are 15° – 30° cooler across the board.

• Reduced Fuel Burn (.5 – 1.5 gph) at your current cruise speed OR –

(for aircraft equipped with a Constant Speed Prop) an increase of 5 – 7 knots in Cruise Speed.

• A Service Ceiling that is 2,000’ – 5,000’ feet higher, with a corresponding improvement in performance at higher density altitudes

Don't just take our word for it - listen to what just some of our happy Power Flow customers have to say about the Power Flow tuned exhaust system on their aircraft:

So, if you like the looks, handling and economy of your Glastar, Sportsman, or other Experimental, but could stand to be a little more pleased with its performance, you will find our Tuned Exhaust to be a very cost-effective and impressive upgrade. 

The Power Flow is a versatile, quality constructed, complete replacement of your current exhaust system. The entire system is constructed of 321 grade stainless steel and includes minimal structural welds in the cabin heat section for improved safety. 

All necessary parts are included for easy installation on your airframe. Our customers report an average install time of between four and seven hours. The system can be installed by one of our dealers, by your local A&P, or you can fly your plane to us for a local installation.

Our industry leading 60 day money back guarantee means that if for some reason you don’t see the performance benefits listed above on your airplane (or even if you do but you just don’t like all that extra horsepower), you can return the system to us within 60 days of its installation for a full refund of your purchase price. Fine Print? You just read it.

For lead times and discounts see table below

Polished or Ceramic? 

The Ceramic Coated tailpipe is a cosmetic enhancement that hides the heat induced discoloration that is characteristic of stainless steel (think of the "bluing" you see on the muffler of a motorcycle). 

This discoloration has absolutely no effect on performance or reliability but the ceramic coating covers it up permanently. Otherwise, the polished tailpipe begins to discolor after a few hours of flying time. 

It can be re-polished anytime, but if you are proud of your aircraft’s appearance and would rather spend your time flying than polishing, the ceramic is a nice feature to have.

A couple of other important pieces of information:

#1.) We strongly recommend that the aircraft's propeller be dynamically balanced to within 0.2 ips (inches per second) upon installation of the Power Flow System and every two to four years thereafter. If the propeller is dynamically balanced within 25 flight hours of the installation of the Power Flow System and you furnish PFS with copies of the logbook entries confirming this, PFS will extend the warranty on the Tuned Exhaust System from 12 months to 24 months or 500 Flight Hours (whichever occurs first).

Doing so every 2 - 4 years thereafter will dramatically improve the useful life and the reliability of every component that is bolted to the engine, including the Power Flow System.

#2) The Power Flow System has no service life limit. It is designed and built to last several thousand flight hours and will quite likely be the last exhaust system you need to buy for your aircraft. As with any high performance system however, it must be maintained properly. Every 500 flight hours or annually (whichever comes first) the four slip joints on the system must be cleaned and lubricated with high temperature anti-seize compound.

Most Customers have this maintenance performed during the aircraft's annual inspection which adds about 2 hours of labor to the inspection. We have had several of our Tuned Exhaust Systems rack up over 4,000 flight hours of trouble free performance (7,000+ flight hours is the current record in a commercial operation) as long as this maintenance is performed as required. 

Still not sure if a Power Flow is right for you and your airplane? For complete peace of mind, check out our: