Description
This is the largest BMW B58 downpipe on the market with a smooth transition from 4.5" to 5" to 4" to the OEM connection of 3.3". This makes this downpipe compatible with the OEM exhaust system and most aftermarket exhaust systems available.
Nearly all the downpipes on the market neck down quickly to 3" right the start of the flex joint. The most important section of the exhaust is right after the turbo & why we now have what you see here. If you're looking for the least restrictive decat downpipe available, this is your answer.
Downpipe Specification
- Full Stainless Steel 304 Construction
- Stainless Steel Flex Joint
- Inner Stainless Liner for Durability & Longevity
- Deeper Exhaust Note
- Better Turbo Spool
- Improved Throttle Response
Compatibility
- BMW F20/F21 M140i (2016-2019)
- BMW F22/F23 M240i (2016-2021)
- BMW F30/F31 340i (2016-2019)
- BMW F32/F33 440i (2016-2020)
Unless explicitly stated otherwise, all products sold by R44 Performance Limited are designated RACE ONLY and are solely for competition or off-road use limited to racing formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, may violate local, state, and Federal laws. R44 Performance Limited does not implicitly or explicitly confirm the legality of using any products it sells on public roads; that is entirely the responsibility of the consumer.
It is the responsibility of the customer to check with all federal, state local and environmental laws before ordering and installing a product. R44 Performance Limited is not responsible for any fees, fines or costs that a customer may incur as a result of failing to check with federal, state, local or environmental laws before ordering and installing a product.
We get a large number of custom orders and requests everyday, so as a result it is not always possible for us to keep every item in stock at all times in our warehouse. If you require the item urgently please contact our sales team here to check the stock before you make your purchase.
We totally understand if you're not certain a part will be compatible with your car, so we highly recommend contacting us here with your query. Our friendly sales team will then be in touch to confirm if this part is the correct part you are looking for.
All in stock products ship the same day if ordered before 2pm GMT
For out of stock items we will contact you with an estimated wait time if not otherwise specified above.
We offer worldwide shipping on all products. If upon receiving your product you wish to return; we offer a 30-day returns policy. For our in-depth returns information please follow the link. "R44 Returns Policy
All of our products come with a standard warranty of 1-3 years. This is dependant on the type of product however. For more details please see our warranty page here.