Cupra Leon 2.0 TSI 300 MK4 KL1 (2020+) OPF/GPF Back Cat-Back Exhaust - Back Box / Rear Silencer / Muffler Delete - Non-Res or Resonated - 3 Inch T304 Stainless 76.2mm - EA888 Performance System

Unleash your Cupra Leon 300 with a serious sound and weight-saving upgrade

Transform your MK4 Cupra Leon 2.0 TSI 300 PS (KL1, 2020 onwards) with a high-flow OPF-back stainless system that replaces the mid and tail sections and removes the rear silencer for a fierce, motorsport-inspired soundtrack. Built from premium T304 stainless with precision TIG welds and 76.2 mm mandrel-bent pipework, this setup delivers crisper throttle response, a deeper tone and meaningful weight reduction while retaining the factory catalyst and particulate filter.

We run this setup on customer cars and in our own workshop. The feedback is consistently the same: tighter, cleaner, louder and far more engaging than stock. If you want your hot hatch to sound as sharp as it drives, this is the upgrade.

Why owners choose this exhaust

• OPF-back design bolts to the OEM downpipe outlet and replaces the centre and rear sections
• Rear silencer delete for maximum character and a raw, track-inspired note
• 3 inch (76.2 mm) mandrel-bent pipework for smoother gas flow and improved response
• Crafted from high-grade T304 stainless steel with beautiful TIG welds
• Notable weight saving for better dynamics
• Fully guaranteed by the manufacturer, with all required clamps and gaskets included

Sound and weight data

Non-resonated OPF-back, rear silencer removed:
Idle: 65 dB (+7 dB). Static 3,800 rpm: 89.5 dB (+11.5 dB).
Weight: 12.07 kg (saves 6.43 kg).

Resonated OPF-back, rear silencer removed:
Idle: 63 dB (+5 dB). Static 3,800 rpm: 86.3 dB (+8.3 dB).
Weight: 13.72 kg (saves 4.78 kg).

Choose your sound level

• Resonated option: includes a centre silencer for a refined yet sporty tone on the road.
• Non-resonated option: removes the centre silencer for the loudest result. For off-road and motorsport use only.

Built for the EA888-powered MK4

Optimised for the 2.0 TSI 300 PS engine, this system lets the EA888 breathe, giving your KL1 chassis the sound and feel it deserves without touching the catalyst or OPF. Ideal for enthusiasts seeking a cat-back style upgrade that keeps emissions hardware in place.

Compatibility

• Cupra Leon 2.0 TSI 300 PS, MK4 KL1, 2020 onwards
• Works with the standard downpipe outlet and factory OPF

Fitting and support

Want it installed by specialists who know these cars inside out? Book professional fitting at MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a tailored quote and availability.

What enthusiasts say

Our customers love the transformation. Sharper throttle feel, richer tone and a proper hot hatch soundtrack. Developed on the track and refined for the road, this is the Cupra Leon exhaust upgrade that delivers.

Media

Developed on the track, released for the road.

Search-friendly terms

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