The Toyota Celica Ultimate Concept was introduced in 2000. The project was a collaboration between Toyota and
Rod Millen Motorsports. The Ultimate Concept uses the body from a
seventh generation Celica GT-S, but the powertrain and all-wheel drive system from a prior generation
Celica GT-Four. The turbocharged inline-four engine from the GT-Four was modified to produce at 8,000 rpm and of torque at 5,500 rpm. During testing, Millen was reportedly able to achieve a time of 4.9 seconds, a time of 6.7 seconds, and a time of 13.3 seconds at . Millen says these figures were limited by turbo lag and the 5-speed manual transmission from the donor car. The concept also features redesigned front and rear suspension, upgraded brakes, and a fuel cell in the trunk. Most of the stock interior from the seventh-generation Celica was kept, with modifications such as an integrated and mostly hidden roll cage,
Recaro seats with racing harnesses, no rear seats, and a race-style LED
tachometer to keep up with the faster revving engine. The exterior of the car has also been restyled with a new body kit, hood, spoiler and wheels. ==ES3 (2001)==