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BT Racing B58 Catless Downpipe 2016+ BMW M240i/340i/440i/540i/740i & xDrive

SKU: BTR1288
$339.99 CAD $399.99 CAD
Shipping calculated at checkout.

Shipping & Returns

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Shipping cost is based on weight and size. Just add products to your cart and use the shipping estimate tool before checkout to see an accurate shipping cost to your address!

What is your return policy?

We do accept returns. Please email us at to submit your request. Items sent to us without submitting a request will not be accepted.

We have a 14-day return policy, which means you have 14 days after receiving your item to request a return. Customer service is at the top of our values here at Brox Tuning and we try our best to make the return process painless for our customers. If you need more info please click here for our detailed return policy.

When will my order ship?

Once an order is placed, if the item is in stock we will have it shipped out within 1 business day. Out of stock items usually ship within 1-2 weeks. Please email us if you have any questions regarding inventory at

Do you ship worldwide?

We can ship worldwide. If you are outside of Canada or USA, please contact us.

Price Match

If you're shopping for parts and want to make sure you get the best price before you order, give Brox Tuning the opportunity to earn your business. Call us at (416) 798-BROX or email us at with the required info below:

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Local Pick Up

If you are local to our physical location you have the ability to choose the "local pick up" option at checkout! This means you can come and get your items once they are available for pick up avoiding shipping costs. In stock items are usually ready within 1-3 hours. Out of stock items will need 1-2 weeks. Get in touch with us if you have questions about stock levels at or call us at (416) 798-BROX


We are extremely proud to introduce the BT Racing downpipe for your BMW B58 M240i, 340i, 440i, 540i, 740i including xDrive variants. This B58 downpipe is absolutely the best bang for your buck if you are trying to increase power and obtain that extra oomph!

We think BMW B58 is a great engine, even when stock. However, one of the biggest restrictions of the engine is the downpipe that's sitting by your turbo. The stock downpipe on the B58 isn't what we would call performance oriented. It is designed to provide a comfortable drive while reducing emissions. Our B58 downpipe is designed by enthusiasts for enthusiasts. With the BT Racing B58 downpipe, the back pressure is significantly reduced resulting in a quicker turbo spool while reducing turbo lag (not that the B58 had much turbo lag, imagine it with the downpipe). More free airflow also results in more power and an aggressive exhaust note. Our downpipe is made from high quality, hand crafted and tig welded 4.5" 304 grade stainless steel. Install worry-free with our 1 year warranty and hassle-free satisfaction guarantee which includes fitment. Get your tune ready and grab your downpipe today!

BT Racing 4.5″ B58 Catless Downpipe F20/F30/F31/F32/F33/F34/F36/G30/G11/G12 B58 Stainless Steel Downpipe

  • Gain up to 17whp/25wtq
  • Quicker turbo spool, reducing turbo lag.
  • Better exhaust note.
  • Ability to upgrade to Stage II+
  • Made from quality, hand crafted & tig welded 4.5″ 304 grade stainless steel.
  • Smooth radius bends to decrease turbulence and increase flow.
  • Fits the stock & aftermarket catbacks.
  • Backed by BT Racing 1 year warranty.
  • Proudly designed & shipped from Canada.

Fitment Guide

2016+ F22/F23 BMW M240i & M240i xDrive
2016+ F30/F31 BMW 340i & 340i xDrive
2016+ F32/F33/F36 BMW 440i & 440i xDrive
2016+ G30 BMW 540i & 540i xDrive
2016+ G32 GT BMW 640i & 640i xDrive
2016+ G11/G12 BMW 740i & 740i xDrive

This product is for Off-Road Use Only. Items sold for off-road use only are illegal to use on public roads in most states and provinces. This product is intended for racing vehicles which may never be used on a public road.

tune or CEL Delete will be required to avoid a CEL from displaying on the dashboard.

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