Exhaust systems do more than just get air into and out of aircraft engines. Exhaust system design, in terms of exhaust pipe length, diameter and tuning, affect the efficiency and performance of the engine, for better or worse.
Recent casualties in the kit-aircraft universe including AirlinkTECH, Pillar Point Avionics and Superior Air Parts reduce services available to builders and potentially eliminate some healthy competiton. By Marc Cook.