For sale is a professionally built Subaru Impreza WRX STI (EU version), originally purchased as a stock vehicle in Germany and converted from the ground up into a high-level rally-oriented platform.

The car was built under private ownership using well-known Polish motorsport workshops and carefully selected components. This is not a random modified car, but a consistent, driver-focused build.

Engine

2.3L forged stroker engine
Built by Carfit (Poland)
Forged Mahle pistons
Forged connecting rods
Spec C crankshaft
Engine mileage: under 1000 km
Engine tuned for reliability and response rather than peak power
Current output approx. 335–340 HP
Previously tuned up to approx. 360 HP
Very fast spool and strong mid-range performance

Engine Management & Drivetrain

Cosworth Pectel 2 motorsport ECU
Tuned by Łukasz Cieszko
DCCD controller (Neetronics) – adjustable from cabin
Reinforced driveshafts
Motosport clutch:
New STI Group N pressure plate
New AP Racing 6-paddle (unsprung)

Turbo & Exhaust

HTX68 turbocharger
Aftermarket stainless steel exhaust manifold
Heat wrapped
Smaller runner diameter for improved turbo response
Optimized for fast spool and precise throttle control

Brakes & Handling

AP Racing Group N front brakes
AP Racing hydraulic handbrake
Upgraded stabilizer bars (~24 mm)
Anti-lift kit (4Turbo) improving front-end geometry and reducing understeer

Fuel System

Walbro fuel pumps
Injectors matched to engine setup

Additional Equipment

Spec C quick steering rack
Oil cooling system with braided lines
Aramid underbody protection
Water spray system for intercooler (12L Subaru tank)

History & Condition

Originally stock WRX STI (EU, German delivery)
Built by 4Turbo Katowice
Engine installed and configured by Carfit
Recently fully serviced by AMS Race & Rally (~10,000 euro)
No accident history
Very solid chassis condition (anti-corrosion protection)
Minor rust spots near rear arches
Mechanically ready to drive

Mileage

Chassis: 169,850 km
Engine: < 1000 km

Documentation

German registration documents (Brief)
Service book
Available invoices and proof of work
Dyno graphs available
Contact to builders available

Included with the car

Original Subaru STI ECU
Additional winter brake set (Subaru, for 16” wheels – new discs + calipers)
16” wheels with tires
Lightweight performance radiator
Lightweight front crossmember / reinforcement (Spec C type)

Notes

This is a serious rally platform built with focus on response, balance and drivability — not peak numbers.
Fully sorted,no further investment needed, ready to drive.