BMW 340i 440i B58 Downpipe with 200 Cell Hi-Flow Sport Cat & Heat Shield


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MTC Motorsport BMW B58 Stainless Steel Downpipe With Hi-Flow 200 Cell Sports Cat and Heat Shield

The B58 downpipe is machined from T-304 high-grade stainless steel and are tig welded in house.
This downpipe comes straight from the turbo providing a sharper throttle response due to a faster spool of the turbo.
It will provide noticeable power gains and a much more aggressive exhaust note which sounds amazing.
It produces lower temperatures and less exhaust backpressure due to the relief of the turbocharger. The cylinder charge is increased which gives you maximum performance.
Finished in brushed stainless

These will fit the following models with B58 engine and pre OPF.

BMW M140i
BMW M240i
BMW 340i
BMW 440i
BMW 540i
BMW 740i

We have tested this product and found increases of around 20-25 bhp without tuning and 120bhp+ on a tuned car. Professional installation is recommended as some exhausts sit slightly different from others and can be tight.
These should pass an MOT emissions test when fitted. They are road legal and Euro 5 rated.

Shipping Continents: Europe

Shipping Countries: United Kingdom (UK)


Shipping Policy

MTC Motorsport ships Monday-Friday excluding holidays. The shipping cut-off time is 13:30pm (GMT). Orders placed after 13:30pm will be processed the next business day. All orders will be shipped express, usually arriving within 24 hours (UK only).

For orders outside of the UK, an surcharge will occur.

Where do you ship to?

How long will my order take?
Once your order has been dispatched, you’ll receive an email with tracking information.

UK: next day


Refund Policy

We have a 30-day return policy, which means you have 30 days after receiving your item to request a return.

To be eligible for a return, your item must be in the same condition that you received it, unused and in its original packaging. You’ll also need the receipt or proof of purchase.

To start your return or for any returns queries, please contact us at [email protected].

Damages and issues
Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right.

The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item.

We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method. Please remember it can take some time for your bank or credit card company to process and post the refund too.

Please note, to offset the cost of order processing, the customer will be charged a restocking fee by MTC Motorsport on all returned goods unless we accept liability for any unsuitable or faulty item. An amount of 10% of the purchase price plus the original postage will be applied.

Weight 2 kg
Product Brand

MTC Motorsport

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