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The 2021 onwards Seat and Cupra Leon Mk4 represents the modern benchmark for front-wheel-drive performance hatchbacks. Built on the advanced MQB Evo chassis and powered by the 2.0-litre turbocharged EA888 Gen 4 engine delivering between 300ps and 330ps through a rapid 7-speed DSG transmission, this platform offers breathtaking acceleration, razor-sharp handling, and daily usability. JXL Performance is your ultimate destination for high-performance hardware to push your Leon Mk4 to its absolute limits.

Explore our complete range of Seat and Cupra Leon Mk4 performance upgrades by category: To maximize horsepower and unleash the 2.0 TSI sound, upgrade your airflow and thermal efficiency with our Intake and Cooling ranges, alongside high-flow Exhaust systems and uprated Turbocharger hardware. For immediate power increases, utilize our Fuel/Ignition tuning boxes and prepare for extreme power levels with our Engine Build forged internals. To harness power through the front wheels and sharpen chassis dynamics, browse our comprehensive Drivetrain, Suspension, and Wheels/Spacers offerings, while maintaining fade-free stopping power with our recommended Brakes section. Finally, enhance your car's aggressive stance with premium Exterior aero and supportive Interior upgrades, while keeping your EA888 Gen 4 motor running at its peak with our OEM-spec Service Parts. Alternatively, you can browse our entire catalog of upgrades in the Shop All Parts collection.