The MazdaSpeed Proteg boasts an aggressive appearance and enhanced performance package, including an inter-cooled turbocharger, limited-slip differential, ultra low-profile tires, larger wheels, more powerful European-specification four-wheel disc brakes, and a 450-watt MP3 audio system by Kenwood.
Mazda selected Callaway Cars, Inc. to assist its engineers in taking the Mazda 2.0-liter DOHC I-4 engine to a much higher performance level. Pumping up the MazdaSpeed Proteg's heart rate is a Garrett T25 turbocharger system. The turbocharger incorporates the latest in aerodynamic and ball-bearing technology. With Garrett technology on board, the vehicle gains increased acceleration without sacrificing overall efficiency. Delivering an estimated 170 horsepower
solidly to the ground is a Tochigi Fuji Sangyo KK Super Limited-Slip Differential, assisted by larger 24mm driveshafts (versus 22mm for the standard Proteg). Mazda also added a heavy-duty clutch disc and pressure plate to handle the increased horsepower from the turbocharging system.
Racing Beat, a well-known tuner of Mazda vehicles for more than 30 years that has most recently created exciting performance and aftermarket products for the Proteg, MP3 and Miata, was asked by Mazda North American Operations' Research and Development team to lend its expertise in the creation of the new MazdaSpeed Proteg. As they did with the MP3, Mazda and Racing Beat focused their efforts on chassis refinement, suspension upgrades and a high-performance rear muffler. The result is a sport compact sedan with even better handling and overall performance than its predecessor.
The MazdaSpeed Proteg comes complete with Mazda- and Racing Beat-engineered front MacPherson struts, a strut tower brace, higher rate coil springs, re-valved Tokico dampers, and larger diameter stabilizer bar bracket and bushings. The rear suspension boasts Racing Beat-tuned independent struts with Twin Trapezoidal Links (TTL), coil springs and larger stabilizer bar. The special Tokico dampers on the 2003 MazdaSpeed Proteg have been designed to improve steering feedback and response, control excess chassis motion and keep the tires planted firmly on the road surface. The twin-tube low-pressure design uses a multistage variable-aperture sandwich-valve system consisting of precision spring plates and angle-drilled piston ports. This sophisticated oil-flow-management system provides just the right amount of resistance at a wide variety of suspension motions and velocities.
Japan's premier performance wheel manufacturer, Racing Hart, developed its first set of Mazda-exclusive alloy wheels for the Mazda MP3 in 2001. For the MazdaSpeed Proteg, Racing Hart has developed an entirely new wheel, another exclusive 17x7-inch five-spoke design in alloy with Aluminum Super Silver finish. The Racing Harts roll on Bridgestone Potenza RE040 215/45ZR17 uni-directional