Since 1968, Wall Colmonoy has been the leader in Aircraft Exhaust Systems with a reputation for quality, reliability and safe ... ty. Wall Colmonoy Oklahoma City manufactures and overhauls Nicrocraft™ Aircraft Exhaust Systems. Individual exhaust components and complete systems are available for most single and twin engine aircraft. Both newly manufactured and overhauled with FAA-PMA / STC approved parts, Nicrocraft™ exhaust components can be found on Beechcraft, Cessna®, Cirrus®, Piper® and other aircraft. Wall Colmonoy is the supplier of choice to the OEMs, and all mufflers are built to the latest original equipment specifications. NICROCRAFT. BUILT TO TAKE THE HEAT. Website: https://www.nicrocraft.com Facebook: https://www.facebook.com/Nicrocraft Twitter: https://twitter.com/nicrocraft read more