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PIPER ENFORCER
Based on the lessons learned with the Turbo Mustang III, Cavalier designed an improved aircraft around the Lycoming T55 engine. The new design caught the interest of Piper Aircraft, who purchased the entire program from Cavalier in late 1970.
Piper heavily modified the Turbo Mustang III prototype, unveiling the new aircraft in early 1970 as the Piper PE-1 Enforcer. Piper also modified a second P-51 airframe, which they also converted into a 2-seat, dual-control version called the PE-2 Enforcer.