Testimonial: The exhaust on my Cessna A185F on Aerocet 3500L has made a difference. Yesterday, I left with full fuel, 4 people, baggage with 90F temperatures and no wind. With the new exhaust, the airplane is an animal, breaking the water and climbing at 1000 FPM. The exhaust lowered my CHTs by 20-30 degrees, evened out my EGTs to +/- 40 degrees and increased my airspeed on floats 2-3 knots. Overall, I couldn’t be happier with the new exhaust.

Brad Libby, Chief Executive Officer, The Motorbrain Group



Cessna 185F/ IO-520D STC Approved!!

Anchorage FAA/ACO office issued the 185 STC on August, 19, 2013!

At this time we are accepting new names for the C185PMCF Production Build List.  The current price for the PMCF with under belly twin tailpipes is $6395.00.  The down payment required is 40% or $2558.00; balance of $3873.00 due upon completion. We are not taking advance orders at the present time due to the extreme interest in our new high performance dual exhaust system. Your contact info will be entered on a new list and prioritized in the order it was received. . When your name rolls to the top you will be contacted. To place your order you will need to pay the 40% down payment as well as supply the following:  name, address, email address and phone number.

*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 TM” 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

Please note; all of our sales are sold as customer specific sales. Due to popularity 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.

Cessna 180, 182 and 185 “Power Monster Cross-Flow” TM
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

Custom Aircraft- www.customaircraftak.com is the recommended installation facility in Alaska for Leading Edge Exhaust Systems’ Cessna 180, 182 and 185 Power Monster Cross Flow dual exhaust systems as well as all their other high performance products.

"Just exceptional "

climbs like crazy and free of vibations !!!

Joel Francoeur

...read full review

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Cessna 185F/ IO-520D STC Approved!!August 27th 2013

Attention Cessna 180, 182 and 185 owners!! Cessna 185F/ IO-520D STC Approved!! We were notified by the Anchorage FAA/ACO office 185 STC was issued today, August, 19, 2013! At this...



Noise test data for the Cessna 180, 182 and 185 Aircraft has been accepted.July 4th 2013

Attention Cessna 180, 182 and 185 owners!! LEES’ noise test data for the Cessna 180, 182 and 185 Aircraft has been accepted. It is being sent to FAA AEG  for final review. The noise...