WSTN Performance
WSTN Mercedes A45/CLA45/GLA45 AMG Catless Downpipe 2020–2025 M139 2.0T (W177/C118/H247)
► Free Australian Delivery Over AU$99
► Free International Delivery Over AU$200
► Only The Highest Quality Products
Have a question about this product? Contact Us
Hand built to order. Ships in 1-2 Weeks
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► Free Australian Delivery Over AU$99
► Free International Delivery Over AU$200
► Only The Highest Quality Products
Have a question about this product? Contact Us
Hand built to order. Ships in 1-2 Weeks
► Free Australian Delivery Over AU$99
► Free International Delivery Over AU$200
► Only The Highest Quality Products
Have a question about this product? Contact Us
Hand built to order. Ships in 1-2 Weeks
DESCRIPTION
WSTN Performance Catless Downpipes for the 2019–2025 Mercedes A45, CLA45, and GLA45 AMG (M139 2.0L turbo) are engineered to unlock the full potential of the world’s most powerful 4-cylinder engine. By removing the restrictive factory catalytic converter, you’ll get instant turbo spool, raw exhaust note, and increased top-end performance — all built for aggressive driving.
Constructed from stainless steel and wrapped in integrated thermal insulation, this system manages heat effectively without needing external wraps, giving you both performance and protection in one package.
Why Upgrade?
✅ OEM-style heat insulation – Integrated wrap helps manage radiant heat, no external wrap required
✅ Mandrel-bent piping – Removes all restrictions for maximum power
✅ Stainless steel – Built to last under heat and pressure
✅ CNC flanges & TIG welds – Precise fitment and long-term durability
✅ Track-ready sound – Aggressive, raw, and addictive under load
✅ Bolt-on installation – No cutting or welding required
✅ 1-Year Warranty – Peace of mind, even at full send
Fitment & Compatibility
✔️ Mercedes-Benz A45 AMG (W177, M139) — 2019–2025
✔️ Mercedes-Benz CLA45 AMG (C118, M139) — 2020–2025
✔️ Mercedes-Benz GLA45 AMG (H247, M139) — 2020–2025
Fits all M139-powered 45-series AMG variants (non-S and S models)
Whats In the Box
• 1 × WSTN Performance Catless Downpipe (Thermal-Insulated)
*Stock clamps including V band to be transferred to the WSTN downpipe*
Installation
🛠 Fitment: Direct bolt-on to OEM turbo flange
⏱ Time: ~ 2 hours
🔧 Tune Required: To avoid CEL and fully unlock power
Why WSTN Performance?
✅ Premium T304 stainless steel
✅ Integrated heat shielding — no wrap needed
✅ Built in the same facilities as leading Performance brands
✅ Backed by our 1-Year Warranty
Next-Gen AMG, Unleashed
The factory setup dampens the stock engine and therefore not allowing for maximum power. This downpipe lets it breathe, raw, responsive, and unapologetically AMG.
WSTN Catless Downpipes: no filters, no restrictions, no compromises.
FAQ
Yes, We Deliver Worldwide with DHL, FeDex, UPS and More
Detailed fitment data is included in the "Fitment" or "Compatibility" section of every product page.
If you need to confirm a specific fitment before we start your build, please message our team through live chat or at contact@wstnperformance.com or our live chat
To ensure you can shop with total confidence, the majority of our performance parts, including our premium exhausts and carbon fibre range are backed by at least a 12-month warranty.
We specify the exact coverage on every product page so you’re always informed. For the finer details, feel free to explore our full [Warranty Policy].
If you’d like to confirm coverage for a specific build, our experts are ready to help via Chat or at contact@wstnperformance.com
We want to get your parts to you as quickly as possible.
To ensure total transparency, specific delivery estimates are clearly displayed on each product page and at checkout.
- In-Stock Items: Typically arrive in 1–3 business days (Express) or 3–7 days (Standard) within Australia.
- Made-to-Order: To ensure the highest quality, some of our specialised components are handcrafted to order and generally ship within 1–2 weeks.
- International: We ship worldwide via Express (2–5 days) and Standard (3–10 days).
Need a precise lead time? If you’re planning a build and need to confirm availability, our team is available via Live Chat or at contact@wstnperformance.com. or contact us
Most of our products are often treated as standard hardware upgrades.
However, since manufacturer warranties vary by brand and location, we are unable to provide a universal confirmation on coverage.
To be 100% safe, we recommend checking with your dealership prior to purchase.
Our return policy lasts for 14 days. If more than 14 days have passed since your product was delivered, we regret to inform you that we can't provide a refund or exchange.
Yes, we certainly can. Beyond our listed range, we have an extensive global network that allows us to source a vast array of OEM, Aftermarket, and Genuine parts from around the world. Whether you are looking for a rare factory component or a specific performance upgrade, we are here to help.
To help us assist you as quickly as possible, please make sure to include your vehicle details (Make, Model, Year, and Series/VIN) along with the part you are chasing.
Currently, WSTN Performance operates as a specialised parts supplier, however, we are actively expanding our service offerings.
We are currently working on establishing a network of certified partner workshops to provide professional installation, with future plans for our own dedicated facility.
Are you a workshop owner?
We are always looking to partner with high-quality workshops interested in installing or stocking our range. If you would like to join our authorised network, please reach out to us via Live Chat or email at
contact@wstnperformance.com to discuss a partnership.
