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Aircraft exhaust systems

Quality isn't expensive...it's priceless! TM

Cessna 180, 182 and 185 “Power Monster Cross-Flow”
US Patented Dual Exhaust System.

  • Converts antiquated high back pressure muffler to true dual exhaust
  • *Gain 15 hp and 28 pound feet of torque on an 0470 engine leaned to 2600 rpm, Dyno Tested.
  • Less back pressure, increased performance
  • Unique U.S. Patented "Cross-Flow" dual exhaust system consists of two totally independent high performance mufflers
  • 2½" tailpipes
  • 1¾" x .049" mandrel bent, equal length primary tubes
  • ¼" flanges - 4 Hole
  • Patented 3-1 collector
  • Heavy duty fully tig welded construction

We have successfully passed the flight testing for the pre 55 C180 Dual Exhaust System. FAA/ACO advised us we could only have one STC project active at one time so we decided to complete the pre 55 ESA first. Having said that, our focus can now be solely on the PMCF. Our first run of pipes did not duplicate the PMCF prototype close enough because we were trying to reduce lead time tooling costs. The first run pipes did not fit the 185 engine mount but did fit the post 55 180’s utilizing a single muffler can as you can see in the auto sequencing photos; one aircraft a `67 model with an O550 engine has 2 tail pipes exiting the lower cowl and the `56 O470 with the long tailpipes.

We are reworking our final welding fixtures trees to copy the  prototype outlet end much closer. The CMM data to produce the drawings is completed as well as the dyno testing. The test fit in the prototype was also completed. We are focusing on the 180, 182 and 185 PMCF and plan on completing everything ASAP, except…… the noise and flight testing until required warmer spring temperatures arrive.

I will reiterate the fact that if your name and the required information is not submitted as requested for the “200 Build List” we will not be able to provide you an estimate when your system will be completed. You need to get on the list ASAP!

Please note; all of our sales are sold as customer specific sales. Due to popularitry and demand of LEES' products we do not stock any of the products we manufacture. The down payment is required in order to procure materials required to build LEES' exhaust systems. Therefore there are no refunds on down payments.

Attention Cessna 180, 182 and 185 owners. Check out the US Patented "Power Monster Cross-Flow" dual exhaust system offer below.

Be one of the first to get a Leading Edge Exhaust Systems' high performance dual exhaust system!!

Please provide the following information to have your name added to the Cross Flow Dual Exhaust “Build List”. You will be assigned a priority number and future contact with you will be made by the priority number assigned. The “Build List” priority is for the first 200 systems only. Subsequent orders will be filled on a first come/first serve basis. Once we obtain the STC you will be contacted and have one week to make the 40% down payment. If we do not receive payment within 1 week your name will roll to the bottom of the list. Please remember this is a 30,000 aircraft market. LEES has already received a lot of inquiries and interest will grow exponentially once STC approval is granted. There is no guarantee on completion date if your name is not on the”Build List” so…… we suggest you sign up now!!

Those of you in the “Experimental Crowd” please submit the same information and your name will be added to the”Build List” in the priority we receive your data. We are currently in the process of tooling up and will build the Experimental Customer’s systems while we are conducting noise and flight testing for the STC customers.

The anticipated normal retail price is $4995.00. The down payment required will be $1998.00 with the balance due upon completion.
Information required: your name, address, phone number, email address, aircraft model number, aircraft model year, model engine, horsepower, what propeller and are you on floats, wheels and/or skis.

Email Address: Performance@wemakeyoufly.com

Please check out the Cessna 180, 182 and 185 " Power Monster Cross-Flow" dual exhaust system product page for photos and all the details!!!

Thank you, Dane Wagner, Owner

Now more Horsepower and unbelievable Prop Twisting Torque is possible simply by installing LEES’ new “Cross-Flow™ dual exhaust system. LEES has just completed the final test fit on a Cessna 185 model aircraft. The aircraft information listed below is for the airplane used for test fit. Dual 2-1/2” tailpipes exit the lower cowling. Two tailpipe exit holes will be required in the L/H and R/H side of lower cowling. Exhaust pipes in the photographs were tacked for final fit up.

Please note: We anticipate being flooded with phone calls so please email your questions to us at Performance@wemakeyoufly.com. In order to respond to the emails we are anticipating we will not be accepting inquiries by phone.

Please review the new photos that accompany the “Power Monster Cross-Flow Dual Exhaust System”™. They provide a very good overview of LEES’ latest project. This project has been a long time coming and will satisfy the needs of a 30,000 airplane market. We are anticipating being able to conduct noise and flight testing later this year.

The “Power Monster Cross-Flow” ™ Dual exhaust system will be an FAA/PMA approved product for the Fully Certificated General Aviation Aircraft market.

*According to customer dyno tests. The latest dyno test was done at Lycon Engines using one of Ken's IO550 Exp. 11:1 compression ratio engines. It pulled 354 Hp and 668 pound feet of torque with the stock Cessna exhaust system @ 2700rpm and with Leading Edge Exhaust System's "Power Monster Cross-Flow™" dual exhaust, it pulled 381 Hp and 708 pound feet of torque @ 2700rpm, a 27 Hp gain and 40 pound feet of torque!
Fits Continental 470, 520 & 550 Engines - U.S. Patent #'s 5768891, 6796402 & USD579841S


Post 55 Cessna 180 “Power Monster Cross-Flow”
US Patented Dual Exhaust System.

Cessna 180, 182 and 185 PMCF Dual Exhaust System

 $4995.00
Post 55 Cessna 180 Models  $4995.00
Post 55 Cessna 180 Models with long tailpipes exiting large cowl flaps  $5495.00

Those of you in the “Experimental Crowd you can get the same exhaust system in advance of the STC. Both approved and “Experimental” exhaust systems are priced the same.

to Learn More About Tuned Versus Equal Length Pipes


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