Some photos may not show the final placement of the WSTN logo on your part.
BMW M3/M4 Equal-Length Z-Pipe Midpipe 2021+ (S58 G8X) | WSTN Performance
Equal-length Z-pipe merge for the S58, tuned for a deeper note and cleaner turbo response.
WSTN Performance equal-length Z-pipe midpipe for BMW M3/M4 G80/G82/G83 S58.
Why Upgrade?
✓ Equal-Length Z-Pipe Design: Double Z-pipe merge collector balances pulse timing across both banks for a smoother, deeper exhaust note and reduced backpressure.
✓ Evened-Out Pulses: Equal-length routing keeps exhaust pulses reaching the turbos in sync, sharpening throttle response over an unequal-length factory-style midpipe.
✓ Direct Bolt-On: Replaces the factory midpipe in the stock location, no cutting or modification required.
Key Features & Specs
Material: T304 stainless steel
Construction: TIG-welded
Design: Equal-length double Z-pipe merge collector
Branding: WSTN Performance logo
Fitment & Compatibility
✓ BMW M3 (G80) / 2021+ / S58 3.0TT
✓ BMW M4 (G82) / 2021+ / S58 3.0TT
✓ BMW M4 Convertible (G83) / 2021+ / S58 3.0TT
Check it fits your car
Use the fitment selector on this page to confirm your exact make, model, and year before ordering.
What's In the Box
✓ 1 x WSTN Performance Equal-Length Z-Pipe Midpipe with WSTN Performance logo
Installation
Difficulty: 2 of 5: bolt-on midpipe replacement
Time: 1 to 2 Hours
Mounting: Bolts to factory flanges in the stock midpipe location, factory hangers reused.
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 sell. All WSTN Performance products carry a 1 year WSTN Performance 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. Lead times are shown on the product page. 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
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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.