In the world of modern performance cars, the Subaru WRX STI has long served as a blank canvas for builders chasing everything from rally heritage to track-day precision. Rather than chasing trends or extreme power figures, this 2012 Subaru Impreza WRX STI Limited was built by Kaizen Tuning as a well-executed, performance-focused example of their approach to the platform. Now showing only 28,025 miles and built by the Massachusetts-based performance shop known for its high-horsepower GT-R and time-attack projects, this STI was conceived as a showcase of balance, craftsmanship, and authentic Japanese-inspired execution.
Finished with a full Varis widebody kit, the car carries a motorsport-influenced presence that adds aggressive aerodynamics with a clean design. The Varis D-widebody conversion includes flared fenders, revised bumpers, side skirts, front and rear carbon fiber diffusers, and a functional carbon fiber hood, all engineered to reflect the STI's rally DNA while enhancing airflow and downforce. The build retains the factory rear wing to preserve its street-focused character, while custom LED Kaizen Tuning logo lighting integrated into the door handles adds a subtle signature. The look is anchored by forged, "Burning Red" 18x11 Volk Racing TE37RT wheels at all four corners, one of the most respected designs in Japanese performance culture. Mounted in a 295mm square configuration with Toyo Proxes R888R DOT competition tires, the setup reinforces the car's performance-focused intent.
Under the hood, the turbocharged EJ257 flat-four is treated to a curated selection of performance upgrades centered around proven components from Perrin, Tomei, Cobb, and DeatschWerks. The engine bay features a Perrin front-mount intercooler system, intake, boost control components, lightweight crank pulley, and fuel system upgrades, all coordinated around a Cobb AccessPort V3 running a custom Kaizen Tuning calibration. Exhaust duties are handled by a Tomei downpipe, uppipe, and unequal-length header, paired with a stainless HKS Legamax exhaust that delivers the signature Subaru boxer rumble. The result is an estimated 300hp at the wheels, a deliberate figure chosen to maintain reliability and everyday drivability. The chassis was treated with the same measured approach. BC Racing BR coilovers work in conjunction with Perrin sway bars, endlinks, chassis bracing, and the Super Steer kit to maximize the benefits of the wider track. Power is routed through the factory STI 6-speed manual transmission and Subaru's Symmetrical All-Wheel Drive system, featuring the STI-exclusive Driver Controlled Center Differential (DCCD) paired with front and rear limited-slip differentials, delivering adjustable torque distribution and exceptional traction under load.
Inside, the cabin was transformed into a driver-centric environment that balances presentation with purposeful materials. Custom upholstered Bride seats with an embroidered "Kaizen Tuning" logo anchor the interior, surrounded by extensive custom Alcantara upholstery with red accent stitching across the dash, doors, rear seats, and trim panels. Carbon fiber interior accents, a GT Spec steering wheel, and a full suite of Zeitronix gauges add a technical, motorsport-inspired feel. A high-end Kenwood and Hertz audio system with dual subwoofers provides modern entertainment, while the trunk has been custom-finished to showcase the subwoofers and amplifier installation in a clean, display-quality layout. The car's debut at Import Expo in Atlantic City resulted in a Best Subaru award along with runner-up for Best in Show, validating the concept behind the build.
More than just a modified STI, this car represents the core philosophy behind Kaizen Tuning: continuous improvement through thoughtful, well-executed upgrades. Built to demonstrate the shop's capabilities and attention to detail, it stands as a cohesive, professionally assembled example that prioritizes craftsmanship, balance, and authentic Japanese influence.
Key Highlights
Built and tuned by Kaizen Tuning
28K original miles
Turbocharged 2.5L EJ257 H4
STI close ratio 6-speed manual transmission (TY856)
Subaru Symmetrical all-wheel drive
Driver Controlled Center Differential
Helical front and Torsen rear limited slip differentials
Cobb AccessPort V3 handheld tuner
Perrin front-mount intercooler
Tomei header, uppipe, and downpipe
HKS Legamax exhaust
BC Racing coilovers
Perrin front and rear sway bars
DBA Performance brake rotors
18" Volk Racing TE37RT wheels
295mm Toyo Proxes R888R competition tires
Varis D Widebody kit
Varis carbon fiber hood
Varis carbon fiber front and rear diffusers
Custom LED logo lighting
Custom alcantara and carbon fiber interior with red stitching
Custom Bride Stradia II seats
GTSpec steering wheel
Zeitronix gauges
Kenwood Excelon head unit
Hertz speakers with dual subwoofers
