Remus Sports Rear Box / Back Box Axle-Back Exhaust for Seat Leon Mk3 5F 1.2 TSI Turbo CJZA (2013–2016) – Non-Resonated Stainless Rear Silencer, Quad Exit 4x84mm Tips – Performance Muffler, ECE Approved – FR Compatible

Remus Sports Rear Box with Four 84 mm Outlets – Fits Seat Leon Mk3 5F 1.2 TSI CJZA 2013–2016

Unlock a sharper soundtrack and a motorsport look for your Seat Leon 5F with this Remus straight-through sports rear section. Purpose-built for the 1.2 TSI CJZA 77 kW petrol engine on 2013 to 2016 models, this rear muffler and quad-tip setup gives your hatchback an assertive tone, cleaner flow and a premium finish that elevates both road presence and driving feel.

Hand built in Austria from stainless steel and shot-blasted for durability, the Remus rear box is engineered to reduce back pressure compared with the factory silencer, helping the small turbo engine breathe more freely. The four 84 mm tail trims deliver an unmistakable performance aesthetic that looks right at home on the Mk3 Leon, whether 3 door or 5 door.

Why choose this upgrade

• Deeper, sportier exhaust note from a non-resonated, straight-through design
• Lower back pressure versus OE rear silencer for a crisper response
• Lightweight construction for a more agile feel
• Stainless steel throughout with shot-blasted finish for long-term corrosion resistance
• Precision fitment to factory mounting points – no drama, just a clean install
• ECE type approval as per manufacturer’s listing
• Quad 84 mm outlets for a genuine motorsport-inspired rear end

Compatibility

• Vehicle: Seat Leon Mk3 – chassis code 5F
• Body: 3 door and 5 door
• Engine: 1.2 TSI – engine code CJZA – 77 kW
• Model years: 2013, 2014, 2015, 2016
• Trim suitability includes FR where applicable
• Not suitable for cars with GPF or OPF

Tailpipe finishes – 4 x 84 mm

• Straight cut, carbon insert
• Angled cut, carbon ring
• Black chrome, straight cut, carbon insert
• Carbon outer, angled cut, titanium internals
• Angled cut, rolled edge, chrome

Real-world results

We have installed this system on customer cars and feedback is consistently positive: tighter fit and finish than stock, a purposeful growl when you want it, and tasteful looks thanks to the neatly integrated quad outlets. Expect a noticeable uplift in character without compromising the everyday usability you bought the Leon for.

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Professional fitting

Want it installed perfectly first time? Book fitting with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote, advice on tip choices and convenient workshop availability.

Notes

• Only for vehicles without a petrol particulate filter GPF or OPF.
• ECE homologation as stated by the manufacturer.