The Ford Focus ST Mk4 represents the final, most refined chapter of the legendary Focus ST heritage. Powered by a potent 2.3-litre EcoBoost engine outputting 280ps through an engaging 6-speed manual or rapid automatic gearbox, it utilizes an electronic differential (eLSD) to deliver incredible front-wheel-drive traction. Whether you drive the standard ST, the stunning Azure Blue ST Edition, or a Track Pack model equipped with Brembo brakes and Ford Performance KW V3 coilovers, JXL Performance is your ultimate hub for premium tuning hardware to push this Mk4 platform to the absolute limit.

Explore our complete range of Focus ST Mk4 upgrades by category: To extract massive horsepower and amplify the EcoBoost sound, optimize your airflow and thermal management with our Intake and Cooling upgrades, alongside high-flow Exhaust systems and uprated Turbocharger hardware. For immediate high-power gains, ensure perfect reliability with our Fuel/Ignition products, Remap/Tuning solutions, and bespoke Engine Build components for a fully forged bottom end. To harness increased power through the front wheels and sharpen chassis dynamics, explore our comprehensive Drivetrain, Suspension, and Wheels/Spacers ranges, while ensuring safe, fade-free stopping power with our highly recommended Brakes section. Finally, enhance your vehicle's aggressive road presence with premium Exterior styling and supportive Interior upgrades, while keeping your 2.3 EcoBoost running flawlessly year-round with our dedicated OEM-spec Service Parts.