Note:  The 657687AWL is a 657683AWL that requires a 0.129" hole drilled for EGT. Both Headers come without holes drilled unless specifically requested at the time of purchase. 

Offering the largest inventory of exhaust system components!

McFarlane now has a full product line of exhaust system components, including AWI and Acorn Welding. These leading exhaust manufacturers offer high-quality components for many major aircraft models including Aero Commander, American Champion, Beechcraft, Cessna, Cirrus, Grumman, Mooney, Piper, and Rockwell. Systems and parts for both Continental and Lycoming engines are available.

• Largest inventory in the industry!
• One-stop shop for all your needs
• Save money with complete system kit
• Upgrade with Performance kits

Acorn Welding develops welded, machined, and riveted components for all sectors of aviation. They design and manufacture turbine engine exhaust, Piston aircraft exhaust systems, engine mounts, and support trusses. Other products include assemblies such as induction boxes, seat frame elements, and engine and flight control linkages. Their exhaust products are made from stainless steel or Inconel with design improvements that reduce thermal fatigue and provide longer life.

• Brackets
• Clamps
• Collector Assemblies
• Elbows
• Exhaust Stacks
• Mufflers
• Risers
• Shrouds
• Tailpipes
• Tubes
• And more!