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The B8 and B8.5 generation Audi RS4 and RS5 proudly sit atop their respective ranges, acting as exceptionally fast, GT-inspired cruisers rather than stripped-out track cars. Powered by a glorious 4.2-litre V8 FSI engine that shares its DNA with the Audi R8, these automatic, high-revving heavyweights put their power down through a true mechanical permanent Quattro all-wheel-drive system. JXL Performance is your ultimate hub for premium VAG tuning hardware to help modernise and enhance this iconic platform.

Explore our complete range of RS4/RS5 B8 & B8.5 upgrades by category:

To unleash the true sound and response of the 4.2 V8 FSI, start by optimising your airflow with our Intake and Cooling upgrades, alongside high-flow Exhaust systems. For those undertaking massive forced induction builds, ensure perfect reliability with our uprated Fuel/Ignition solutions, Turbocharger conversion hardware, and fully forged Engine Build components.

To hide the platform's hefty curb weight and keep that V8 power firmly planted through the mechanical Quattro system, drastically improve your chassis dynamics via our comprehensive Suspension, Drivetrain, and Wheels/Spacers categories, while ensuring fade-free stopping power with our complete Brakes range.

Finally, perfect your vehicle's aggressive, wide-arch stance with our Exterior styling and supportive Interior upgrades, and keep your high-revving 4.2 V8 running flawlessly year-round with our dedicated OEM-quality Service Parts.