Wagner Tuning B58 Catless Downpipe Kit for BMW Fxx M140i M240i 340i 440i
Product Description
The Wagner Tuning B58 Catless Downpipe is a high-flow, competition-focused exhaust upgrade engineered for BMW F-Series models equipped with the first-generation B58 engine. By removing the factory catalytic converter, this downpipe offers the least restrictive exhaust path possible — improving turbo spool, reducing backpressure and maximising performance potential for high-power builds.
Designed for track, off-road and motorsport use, the Wagner catless downpipe is perfect for drivers who want uncompromised flow, stronger mid-range torque and faster turbo response from their B58-powered BMW.
Key Features
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Completely catless design for maximum exhaust flow
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Significant reduction in backpressure and turbo spool time
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TIG-welded stainless-steel construction for long-term durability
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Supports Stage 2 and high-output B58 builds
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OEM-style mounting points for straightforward fitment
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Improved throttle response and stronger mid-range pull
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Designed specifically for B58 Gen 1 F-Series applications
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Ideal for track and competition environments
Compatibility
BMW F-Series B58 Models (Gen 1)
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M140i (F20/F21)
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M240i (F22/F23)
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340i (F30/F31/F34)
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440i (F32/F33/F36)
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X3 M40i / X4 M40i (selected B58 F-Series models)
(Not suitable for G-Series, OPF/GPF-equipped or B58TU vehicles.)
Ideal For
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High-power B58 builds requiring maximum exhaust flow
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Track-driven cars where catalytic restrictions limit performance
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Vehicles fitted with hybrid turbos or upgraded fuelling
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Drivers wanting sharper, faster turbo spool and stronger torque delivery
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Owners looking for a motorsport-grade exhaust upgrade to pair with Stage 2 software
Why Choose the Wagner Tuning B58 Catless Downpipe Kit
For drivers chasing maximum performance from the B58 engine, a catless downpipe is one of the most impactful hardware upgrades. Wagner’s catless system is built using premium stainless steel with precise TIG welds, ensuring excellent strength and durability even under extreme heat and boost pressure.
By eliminating the catalytic converter, exhaust flow improves dramatically — reducing turbo strain, lowering EGTs and unlocking noticeably quicker spool. Wagner’s reputation for precise fitment and robust engineering makes this one of the most trusted catless downpipes for the F-Series B58 platform.
Installing / Notes
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For off-road, competition or motorsport use only
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Professional installation recommended
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ECU tuning is required to avoid check-engine lights and optimise performance
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Not suitable for road use in many regions
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Not compatible with OPF/GPF-equipped cars
Shipping & Delivery
Dispatch Times
Most stocked items dispatch within 1–2 business days. Some products may have longer lead times due to special ordering, availability, or build times. If your order contains multiple items, they may be shipped together once all items are ready unless otherwise agreed.
UK & International Shipping
We ship worldwide. Transit times vary depending on destination and courier. Tracking details are provided once your order is dispatched.
Import Duties & International Orders
International customers are responsible for all import duties, taxes, and clearance fees. These are not included in our prices and are outside of our control. Refusal or non-payment of import charges may result in return shipping, handling fees, and customs charges being deducted from any refund.
Damaged Shipments
If your parcel arrives visibly damaged, please refuse delivery or note the damage with the courier. If damage is discovered after opening, contact us immediately with photos. Do not install damaged items, as installation voids courier claims and return eligibility.
Returns
Returns must be authorised before sending anything back. Returns must be requested within 14 days of delivery and returned within 14 days of approval, in unused/uninstalled condition and in original packaging. Some items, including special-order, built-to-order, used, installed, or modified parts, are non-returnable.
Full details are available in our Shipping Policy and Returns & Refund Policy.
Warranty & Disclaimer
Warranty
Most products include a manufacturer’s warranty covering manufacturing defects only. Warranties do not cover wear and tear, improper installation, misuse or neglect, track use, competition or racing environments, labour costs, vehicle damage, downtime, or consequential loss. Warranty outcomes are determined by the manufacturer, not Clubsport Garage. Items must be returned for inspection at the customer’s cost unless agreed otherwise.
Fitment & Installation
Many products are aftermarket components and may require professional installation or minor adjustment. Perfect OEM-level fitment cannot be guaranteed. Professional installation by an experienced workshop is strongly recommended. Installed or used items cannot be returned.
Motorsport Use Disclaimer
Some products are intended for off-road, track, or motorsport use only and may not be legal for road use, for example non-TÜV/DOT-approved parts. It is the customer’s responsibility to ensure compliance with local laws, insurance requirements, and vehicle regulations. By purchasing and installing aftermarket parts, you accept all responsibility for ensuring compatibility, legal compliance, proper installation, and any resulting wear, damage, or failure.
Product Images & Descriptions
Product photos are illustrative and may differ slightly from the item supplied. If specific details are important, please contact us before purchasing.
Full details are available in our Terms of Service and related policy pages.
