Description
The (TUR) FORD BARRA I6 DOHC VCT , produced between 2002 and 2014. It became one of Australia’s most iconic performance sedans and utes. At the heart of this model was the Ford Barra engine, a 4.0-litre inline-six turbocharged petrol unit with a DOHC (Double Overhead Camshaft) configuration, 24 valves, and Variable Cam Timing (VCT). This engine powered both 2-door and 4-door variants, delivering exceptional performance and reliability. A critical component of its operation was the outlet system, referenced under part code PG491. This managed exhaust gases and ensured the turbocharger operated at peak efficiency.
Engine Characteristics
- Barra I6 DOHC VCT: A 4.0-litre turbocharged inline-six with 24 valves. The DOHC layout allowed precise valve timing, while VCT technology adjusted camshaft timing dynamically for improved efficiency and power.
- Turbocharging: The turbocharger boosted intake pressure, giving the XR6T remarkable torque and acceleration, making it a standout in the performance sedan market.
- Performance Legacy: The Barra engine became legendary for its tuning potential, with enthusiasts often extracting far more power than factory specifications.
Outlet System (PG491)
The outlet system, including the exhaust manifold and related fittings. It played a vital role in channeling exhaust gases from the combustion chamber to the turbocharger and out through the exhaust system. Its functions included:
- Turbo Efficiency: By directing exhaust gases effectively, the outlet maintained turbine speed and ensured consistent boost pressure.
- Reduced Back Pressure: A well-designed outlet minimized restrictions, preventing overheating and maintaining smooth engine operation.
- Emission Control: The system supported compliance with emission standards by ensuring exhaust gases were processed efficiently before release.
- Durability: Built to withstand high temperatures and pressures, the PG491 outlet system was engineered for long-term reliability under demanding performance conditions.
Vehicle Application
The (TUR) FORD BARRA I6 DOHC VCT offered in both sedan and ute configurations. Appealing to performance enthusiasts and everyday drivers alike. The Barra engine, paired with the PG491 outlet system, gave the XR6T a unique blend of practicality and high performance. Its strong pulling power, smooth delivery, and tuning potential made it a favorite among Australian car enthusiasts.
Legacy
Between 2002 and 2014, the (TUR) FORD BARRA I6 DOHC VCT cemented its reputation as a modern classic. The Barra I6 DOHC VCT engine, combined with the PG491 outlet system, exemplified Ford’s engineering focus on performance and durability. Today, the XR6T remains highly sought after, with the outlet system continuing to be a key focus in maintenance and aftermarket upgrades to sustain turbocharger performance and unleash even greater power.






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