SLN B58 OPF Ceramic-Coated Decat Downpipe – BMW M240i, M340i, M440i & 540i - Clubsport Garage
SLN B58 OPF Ceramic-Coated Decat Downpipe – BMW M240i, M340i, M440i & 540i - Clubsport Garage
SLN B58 OPF Ceramic-Coated Decat Downpipe – BMW M240i, M340i, M440i & 540i - Clubsport Garage

SLN B58 OPF Ceramic-Coated Decat Downpipe – BMW M240i, M340i, M440i & 540i

By SLN
£320.00
Available – Dispatched within 1–3 Days
Worldwide Shipping
Official Dealer
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Product Description

This SLN ceramic-coated decat downpipe is designed for the later Gen 2 / OPF BMW B58 exhaust interface. Its catless stainless-steel downpipe section increases exhaust flow, while the ceramic coating reduces radiated heat around the engine bay.

Further information below.

Key Features
  • Ceramic-coated stainless-steel construction.
  • Catless downpipe section for the later B58/OPF interface.
  • Designed around the two-bolt downstream connection.
  • Direct replacement for the compatible factory downpipe section.

Vehicle Compatibility
  • BMW G20 M340i xDrive Saloon – 2019-on.
  • BMW G21 M340i xDrive Touring – 2019-on.
  • BMW G22 M440i xDrive Coupé – 2020-on.
  • BMW G23 M440i xDrive Convertible – 2021-on.
  • BMW G42 M240i xDrive Coupé – 2022-on.
  • BMW G30 540i / 540i xDrive – later B58/OPF downpipe interface.
  • BMW G29 Z4 M40i — UK OPF specification.
  • Toyota GR Supra A90 3.0 — UK OPF specification.
  • Fitment check: Confirm the later B58/OPF turbo-to-downpipe and downpipe-to-exhaust interface before ordering; model year alone is not sufficient.

What's Included
  • SLN B58 OPF Ceramic-Coated Decat Downpipe

FAQs

How do I choose the correct B58 downpipe?

Match the turbo-to-downpipe and downstream exhaust interfaces. The Gen 1 / early B58 and later Gen 2 / OPF versions are separate products. Model year alone is not sufficient.

Is this an approved road-use emissions component?

SLN lists its decats, sports cats and emissions-system delete parts for off-road or motorsport use only. Do not assume that retaining a sports catalyst provides road-use approval.

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.