The Airtrek was first introduced to the Japanese market on 20 June 2001, priced from ¥1. 7–2. 3 million. It offered a choice of either a 126 PS (93 kW) 4G63 2. 0 L or a 139 PS (102 kW) 4G64 2. 4 L GDI, mated to a standard INVECS-II 4-speed semi-automatic transmission. Both front- and four-wheel drive were available. The four-wheel drive version uses open differentials for the front and rear axles, with a viscous coupling unit for the center differential. A high performance model, called the Turbo R, was introduced in 2002 and used a detuned version of the Lancer Evolution's 4G63T 2. 0 L I4 turbo. The engine produced 240 PS (180 kW) and 343 N⋅m (253 lb⋅ft), although in export markets the Outlander version's output was reduced to 202 PS (149 kW) and 303 N⋅m (223 lb⋅ft). The return of four-cylinder engines under 2. 0 liters offered Japanese buyers a vehicle that was in compliance with Japanese regulations concerning exterior dimensions and engine displacement, however, the exterior dimensions exceed Japanese regulations for the "compact" designation.