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Remus Sports Axle-Back Exhaust Rear Silencer/Muffler Back Box for SEAT Leon 5F ST Estate Cupra 300 (2.0 TSI CJXC) 2017-2018 – Stainless 70mm – Twin 133x85mm Oval Angled Chrome Tips – EEC Approved – Non‑GPF Wagon
Remus Sports Axle-Back Exhaust Rear Silencer/Muffler Back Box for SEAT Leon 5F ST Estate Cupra 300 (2.0 TSI CJXC) 2017-2018 – Stainless 70mm – Twin 133x85mm Oval Angled Chrome Tips – EEC Approved – Non‑GPF Wagon
Heads-up on cancellations & returns: if you cancel an order or return an item, you won't get back 100% of what you paid. We apply a 10% restocking fee, the outbound shipping is non-refundable, and we have to pass on Shopify / PayPal payment processing fees; these aren't returned to us when we refund you. International orders also lose on exchange-rate spread in both directions. If the original packaging is damaged or missing, a reboxing charge applies. For international orders specifically, if you refuse to pay our shipping invoice or supply a prepaid label after placing the order, the same deductions apply. We're upfront about this — please be sure of your purchase before ordering.
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Give your fast estate the soundtrack it deserves with the Remus sports rear section for the Seat Leon 5F ST Cupra 2.0 TSI CJXC 221 kW 2017 to 2018. This premium stainless steel rear unit unlocks a deeper, motorsport-inspired tone while remaining EEC approved for road use. Expect precision build, stunning twin oval outlets and flow optimised pipework that lets the 2.0 turbo breathe.
Key reasons enthusiasts choose this upgrade
- Race-bred character with a refined note at cruising speeds
- Twin oval 133 x 85 mm angle-cut polished outlets for a purposeful, OEM plus look
- Low back pressure design for sharper response and enhanced breathing
- Shot-blasted stainless construction for durability and corrosion resistance
- Lightweight rear section for a more responsive feel
- Engineered for the 5F ST platform for precise fitment and alignment
- Handcrafted in Austria with exceptional finish quality
- EEC homologation for road legality
Fitment and specifications
- Vehicle: Seat Leon 5F ST Estate Cupra
- Engine: 2.0 TSI CJXC, 221 kW
- Model years: 2017 to 2018
- Configuration: Rear section axle back sports silencer
- Pipework diameter: 70 mm
- Tailpipe finishers: 2 x 133 x 85 mm oval, angle cut, chromed
- Approval: EEC approved
- Compatibility note: for non GPF vehicles only
What you will feel and hear
A deeper, richer tone on start-up and acceleration, with a clean, refined soundtrack on motorway runs. The optimised internal design reduces restriction, helping the CJXC engine feel more eager without unwanted harshness. Our customers consistently praise the sound quality, fit and finish, and we rate it highly on our own builds.
Trusted by drivers across the UK
We have supplied and installed Remus systems for many Seat owners and feedback is consistently excellent. The combination of Austrian craftsmanship, premium materials and a tasteful yet sporty sound makes this one of the best upgrades for the Leon ST Cupra.
Professional installation
For the best result and alignment, professional fitting is recommended. Book your installation with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.
Search terms shoppers use
Seat Leon ST Cupra 300 exhaust upgrade UK, Seat Leon 5F wagon performance muffler, CJXC 2.0 TSI rear section, Remus sports backbox Seat estate, oval chrome tips exhaust, 70mm performance rear silencer, Austrian made exhaust UK, EEC legal performance exhaust, Seat Leon Cupra ST sound upgrade, axle back rear box Seat 5F.
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