VT21X – 2021 Subaru WRX STI Rallycross Supercar

Based on a Subaru WRX STI, the VT21x is our team’s latest evolution Rallycross car, built to compete in the Nitro Rallycross series.  The VT21x features VSC’s bespoke custom 2.0 liter, 4-cylinder, turbocharged and intercooled BOXER engine, producing in excess of 600 hp and 680 lb-ft of torque. The car is built closely to the FIA Article 279 rallycross regulations but with some variations allowed within the Nitro Rallycross series regulations.  The 2019 version of this vehicle won the Team’s Championship of the FIA Americas Rallycross Championship (ARX) earning four victories from six rounds.

For more details go to: https://www.subaru.com/content/subaru/en/motorsports/cars/rallycross.html

SRTUSA 2021 Rallycross Supercar   
2021 Subaru WRX STI Rallycross Supercar (VT21X)
Prepared by Vermont SportsCar

ENGINE
Horizontally Opposed 4-cylinder
Turbocharged and Intercooled
Approx. 600 bhp and 680 lb-ft torque with NRX Mandated 45mm Restrictor
Garrett Motorsport Turbocharger

ENGINE MANAGEMENT
Cosworth Pectel ECU

ELECTRONICS
Lightweight Motorsport Wiring Loom
Cosworth Programmable Power Management System
Cosworth data logging system GEMS LDS4 Display

WEIGHT
Regulated Minimum Limit of 1,300kg

TRANSMISSION & DRIVE SYSTEM
SADEV 6-speed Sequential Dog-engagement Gearbox
RCV Custom Driveshafts
RCV Custom Propshaft

CLUTCH
Triple Plate Carbon Racing Clutch

DIFFERENTIALS
VSC (Front) SADEV (Rear)

COOLING
PWR Radiator Mounted in Rear and Ducted
PWR Intercooler Front-Mounted and Ducted

SUSPENSION
Reiger Competition Suspension
Vermont SportsCar Tubular Front and Rear Cross Members
Vermont SportsCar Suspension Arms and Links
Vermont SportsCar Hubs and Spindles

BRAKES / GRAVEL SPEC
Alcon 350mm Front Brakes
Alcon 320mm Rear Brakes
Endless Brake Pads
Vermont SportsCar Hydraulic Handbrake

EXHAUST SYSTEM
VSC Custom Exhaust Manifold
VSC Stainless Steel 4-inch Quick-Change System

WHEELS
KMC “KM-199” Rallycross Wheel

TIRES
Yokohama ADVAN AO54 Rallycross Tires

ROLL CAGE / SHELL PREP
Seam-welded Shell Custom FIA Specification T45 Roll Cage

SEATS
RECARO Ultima with HANS (Head & Neck Restraint)

INTERIOR
Carbon Fiber Dashboard
Carbon Fiber Door Cards
Carbon Fiber Driver Footplate
Schroth Enduro Harnesses

FUEL CELL
FIA FT3.5 Fuel Cell (25+ Liters)

BODY
Composite Bumpers, Fenders and Rear Doors
Composite Under-floor Protection
Carbon Fiber Rear Wing
Aluminum Sump Guard
Aluminum Differential Guard

MISC
Polycarbonate Front Windshield
Polycarbonate Side and Rear Windows
Custom Motorsport Steering Rack (11:1 Ratio)
Motorsport High-flow Power Steering Pump

Subaru Motorsports USA Dust Erruption
2020 VT20X Interior Cockpit
Subaru Motorsports USA NRX Lineup
2020 VT20X Interior Driver Display
NRX Jump Sequence
21x Wheel Close up
21x Testing Pan
2020 VT20X Interior ECU
Subaru Motorsports USA Sunset Lineup NRX
2020 VT20X Interior Cooling Ducts
Subaru Motorsports USA NRX Jump Test
21x Subaru Motorsports USA Gravel Spray