WSTN Performance
WSTN BMW B58 Catless Downpipe 4.5" M240i M340i F & G Series (F22/F30/G20/G30)
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
In stock. Ships in 2-4 Days
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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
In stock. Ships in 2-4 Days
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
In stock. Ships in 2-4 Days
DESCRIPTION
Fix the factory restriction. Let the B58 breathe.
The B58 responds instantly when you remove the biggest bottleneck in the system: the OEM catalytic converter. The WSTN Performance BMW B58 Catless Downpipe is engineered to maximise exhaust flow straight off the turbo, reducing backpressure and turbulence for faster spool, sharper throttle response, and a harder pull through the mid-range and top end. Built from high-grade stainless steel with smooth, high-flow bends, this is the go-to upgrade for anyone chasing real performance and a more aggressive turbo note.
This downpipe installs using the factory V-band connection, bolts directly to the OEM turbo or compatible aftermarket turbos, and mates to the OEM exhaust system for a clean, OEM-style fit.
WHY UPGRADE?
✅ Faster Turbo Spool: Reduced backpressure helps the turbo come on harder, earlier.
✅ Proven Power Gains: Typically +20–25 whp and +25–30 wtq with correct supporting mods/tuning.
✅ Maximum Flow: Catless design removes the OEM restriction for the best possible exhaust efficiency.
✅ Strong, Heat-Ready Build: High-grade stainless steel built to handle boost and temperature.
✅ RHD & LHD Compatible: Designed to suit both right-hand and left-hand drive layouts.
KEY FEATURES & SPECS
Material: High-grade stainless steel.
Construction: Smooth-bend high-flow design to reduce turbulence and improve exhaust efficiency.
Mounting: Factory-style V-band fitment at turbo.
Design: Catless for maximum flow and response.
Compatibility: Direct fit to OEM turbo (and compatible aftermarket turbos) with OEM exhaust connection.
Drive Orientation: Compatible with RHD and LHD.
FITMENT & COMPATIBILITY
✔️ BMW M240i / M240i xDrive (F22/F23)
✔️ BMW 340i / 340i xDrive (F30)
✔️ BMW 440i / 440i xDrive (F32/F33/F36)
✔️ BMW 340i xDrive (F34)
✔️ BMW 740i / 740i xDrive / 745e xDrive (G11)
✔️ BMW M340i / M340i xDrive (G20)
✔️ BMW 540i / 540i xDrive (G30)
PRODUCT SPECIFICATION
Power Increase: +20–25 whp and +25–30 wtq (typical results with correct setup).
Flow: High-flow bends to reduce restriction and turbulence.
Material: High-grade stainless steel.
Fitment: Direct bolt-on using factory V-band clamp.
Drive Orientation: RHD & LHD compatible.
WHAT’S IN THE BOX
1 x WSTN BMW B58 Catless Downpipe
2 x O2 Sensor Bungs
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.
