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The 2014-2020 Seat and Cupra Leon Mk3 cemented itself as an everyday supercar killer, blending MQB platform dynamics with the proven power of the 2.0-litre turbocharged EA888.3 engine. Available with a rapid 7-speed DSG gearbox or a classic 6-speed manual driving the front wheels, this platform delivers phenomenal pace, sharp handling, and incredible versatility. JXL Performance is your ultimate hub for premium tuning hardware to push this iconic hot hatch to the absolute limit.

Explore our complete range of Seat and Cupra Leon Mk3 upgrades by category: To extract massive horsepower, 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 components, while fortifying your block with high-strength internals from our Engine Build section. To harness increased power and sharpen the 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 EA888.3 engine running flawlessly year-round with our dedicated OEM-spec Service Parts. Alternatively, you can browse our entire catalog of upgrades in the Shop All Parts collection.