Subaru Impreza WRX STI (2011))
New Designs for 2011 In front, the 2011 WRX STI models feature sharpened bumper corners and wider, blacked-out fog lamp nacelles to accentuate the "wide and low" profile. A jutting lip spoiler with three-dimensional detailing emphasizes the cars' sporty intent. The newly designed front grille with black base and blacked-out Subaru wing highlights the headlights' shape to give the entire front end a more powerful appearance, accentuated by larger grille and bumper intake openings.
New Chassis Tuning for 2011. The Subaru Impreza WRX STI was already a highly optimized performance machine. Specific chassis tuning. Aluminum front lower L-arms reduce unsprung vehicle weight. Major chassis tuning changes include a lowered ride height and new pillow-ball bushings in front and stiffer bushings for the rear subframe that supports the double-wishbone suspension - these improve camber and toe stiffness.
Both the front and rear suspension systems employ higher-rate springs and thicker front and rear stabilizer bars than the 2010 model: 21 mm vs. 20 mm in front and 19 mm vs. 18 mm in rear. Spring rates have increased by 15.6 percent in front and 53 percent in the rear.
New standard 18-inch aluminum wheels feature high-luster paint and weigh 17.6 lbs. less than the previous standard wheels. The optional 18 x 8.5-in. BBS® forged aluminum-alloy wheels, which further reduce unsprung vehicle weight, are highlighted by silver high-luster paint for 2011.
Exclusive to the Subaru Impreza WRX STI, the Brembo Performance Brake System uses ventilated 4-wheel Super Sport anti-lock (ABS) disc brakes with Electronic Brake-force Distribution (EBD). Super Sport ABS can control the braking forces at each rear wheel independently, which optimizes braking ability during hard cornering to help reduce understeer.
New for 2011, the WRX STI interior is finished in black and silver to highlight its sporty design. Trim panels, the steering wheel air bag cover and steering wheel switches are now dark cast metallic. The standard tilt and telescopic steering wheel is a three-spoke, leather-wrapped design embossed with the STI logo and features control switches for Bluetooth® hands-free phone function. A new AM/FM stereo with single-disc CD player features Bluetooth audio streaming and hands-free calling, iPod control capability, a USB port, 3.5mm aux. input jack and XM/SIRIUS satellite radio (subscription is extra). An available navigation system integrates a vehicle information center and Bluetooth hands-free calling.
source : various sources