About Us


Since 1968, the leader in Aircraft Exhaust Systems.

Wall Colmonoy manufactures and overhauls Nicrocraft™ Aircraft Exhaust Systems.  Individual exhaust components and complete systems are available for most single and twin engine aircraft.

Nicrocraft Facility

Both newly manufactured and overhauled with FAA – PMA / STC approved parts, Nicrocraft™ Systems can be found in Cessna, Cirrus, Beechcraft, Mooney, Piper and other aircraft.

High temperature nickel brazing and Nicrobraz® brazing filler metal, originally invented by Wall Colmonoy, is used extensively in the construction, which is fundamental to weight reduction while maintaining optimal strength.  

The Nicrocraft engineering process has been carefully designed:

  • To allow for longer service life.

  • To ensure proper alignment.

  • To rigorously test for leaks since exhaust system failures can cause carbon monoxide poisoning, loss of engine power and even fire.

  • To reduce the risk of stress cracking and increase the overall corrosion resistance of the material.

Nicrocraft™ Aircraft Exhaust Systems are manufactured to the highest quality standards. We offer the Quality Assurance Certifications of:

  • AS9100 Rev D
  • ISO 9001:2015
  • AWS D17.1/D17.1M:2017 (welding)
  • FAA Repair Station # BG2R715K
  • FAA-DER – Exhaust Systems
  • FAA-DMIR On Staff

We remain open as we support “essential business” for critical industries. Read More