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BMW M550i/M550i xDrive Catless Downpipes 2017-2023 (N63 G30) | WSTN Performance
OPF Fitment
NO IMPORT FEES
The price you see includes all taxes and import duties. You won't pay anything more when it arrives.
Unleash the N63. Hear the V8.
The BMW M550i is already a weapon, powered by a 4.4L twin-turbo V8 that sounds extraordinary in stock form. The factory downpipes choke what the N63 is truly capable of. WSTN Performance replaces both factory units with free-flowing stainless steel straight pipes, eliminating the restrictive catalytic converters that cap sound and limit power potential. The result is a deeper, more aggressive exhaust note from idle through to redline, and the breathing room for your tune to properly unlock what this engine was built to deliver.
Why Upgrade?
✓ Deeper, more aggressive exhaust note from the N63 V8 from idle to full throttle
✓ Remove both factory catalytic restrictions that cap sound and limit power ceiling
✓ Paired with an ECU tune, unlocks significant power gains from both turbos
✓ stainless steel construction built for heat, built to last
✓ 1.5mm wall thickness OEM spec dimensions, zero restriction
✓ Hand TIG welded to withstand sustained boost pressure and high exhaust temperatures
Key Features & Specs
Material: 304 Stainless Steel
Wall Thickness: 1.5mm
Welding: High-temperature TIG welding
Surface Finish: Brushed stainless
Configuration: Catless (straight pipe / de-cat)
Set Includes: Both left and right downpipes complete set
Warranty: 3 years manufacturer's warranty
Fitment & Compatibility
✓ BMW M550i G30 2017–2023 (N63 4.4L Twin-Turbo V8)
✓ BMW M550i xDrive G30 2017–2023 (N63 4.4L Twin-Turbo V8)
Select the option that matches your car. Not sure? Email us your VIN, make and model and we'll confirm fitment.
Technical Note
Catless Configuration: These are straight-pipe (de-cat) downpipes. They will trigger a CEL (check engine light) on untuned vehicles an ECU tune is strongly recommended alongside this upgrade.
Professional Installation Recommended: The N63 V8 configuration requires underside access. A qualified workshop with a 4-post hoist is recommended.
Confirm Your Spec: Designed for the standard G30 N63 configuration. Confirm your vehicle build before ordering if you have any dealer-fitted modifications.
What's In the Box
Left downpipe (driver's side) × 1
Right downpipe (passenger's side) × 1
Installation
Difficulty: 3/5
Time Estimate: 2–3 hours
Mounting Type: Direct bolt-on replacement (OEM flange fitment)
Warranty / Shipping
DISCLAIMER
WSTN Performance components are designed for track and competition use. To protect your build and ensure a perfect finish, we recommend professional installation by a certified specialist/workshop. It is the buyer's responsibility to ensure modifications comply with local regulations.
WARRANTY
We stand behind every product we curate. All parts feature a minimum one-year manufacturer's warranty as standard. This covers any manufacturing defects, giving you total peace of mind that your upgrade is built to last. View our full Warranty policy page here.
SHIPPING
We offer tracked worldwide shipping on our entire catalogue. View our full Shipping policy page here.
RETURNS
We offer returns on all products if items are damaged or there is something wrong. If we ever make a mistake, we'll cover the return shipping to make it right. View our full Return policy page here.
SUPPORT
Need a hand with fitment, shipping, or a return? Our Perth-based team is here to help you get your build perfect.
Email: contact@wstnperformance.com
Sound Clip
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OPF Fitment
OPF Fitment
Support
FAQ
Every system we build is vehicle-specific. If you're unsure, reach out before ordering with your make, model, year, and any relevant modifications or click the "Fitment Check" box on this page - we'll confirm fitment before you spend a dollar.
It depends on what's been changed. upgraded turbo, upgraded mid pipe or prior exhaust modifications can all affect fitment. Our exhaust systems/downpipes are designed to fit vehicles stock, from factory. Contact us with your build details and we'll advise honestly.
We work with premium-grade T304 stainless steel and titanium alloy depending on the application. Material specs are listed on each product page
We're built to the same standard, the same materials, the same fabrication quality, the same attention to fitment and finish. The difference is we're not charging you for a badge. You're paying for the product.
Sound level varies by product, vehicle, and configuration. Where available, we've included sound references on the product page. If you want to know what a specific system sounds like on your car, reach out - we'll point you in the right direction.
A properly designed exhaust system reduces back pressure and improves flow - which typically translates to real performance gains. Our downpipes in particular are designed to let turbocharged engines breathe properly. Specific gains depend on your vehicle and tune.
Road legality varies by state, country, and vehicle. It's your responsibility to confirm compliance with your local regulations before fitting. We can advise on the product side, but we can't make that determination for you.
Items listed and in stock ship in 2-3 days. Hand built to order lead times vary by product and are listed on each product page. We'll send you an update at each stage so you're never left wondering where things are.
Yes - we ship worldwide via DHL, FedEx, UPS, and Australia Post depending on your location. Shipping options and estimated costs are shown at checkout.
Reach out before ordering and we'll tell you exactly where things stand and if we can put priority on your build. We'll always be upfront about timeframes.
We strongly recommend having your system fitted by a qualified workshop, particularly for vehicles where warranty or road compliance is a consideration. A professional install also protects the quality of the finished product and ensures proper fitment.
Yes - all necessary hardware is included unless stated otherwise. Some exhausts and downpipes use your cars existing hardware. If anything is missing from your order, contact us immediately and we'll sort it out.
In many cases, yes. Contact us with what you're after and we'll let you know what's possible and what it'll cost.
Contact us directly. We stand behind what we build. If something isn't right, we'll make it right - no runaround.
Yes. Warranty details are outlined in our warranty policy. If you have a specific question about coverage on a particular product, get in touch before you order.
Because every product is built to order, we can't accept returns for change of mind. That's why we strongly encourage you to confirm fitment with us before purchasing - we'd rather sort that out upfront than after the fact.
- Fitment guaranteeTell us your engine code and we confirm the fit before it ships.
- 12 month warrantyEvery system is covered for 12 months.
- Shipped worldwideTracked delivery wherever you are.
- Built to your engine codeMade to order for your exact car, not a universal part.