TCM B58 4.5" Race Downpipe BMW 240i/340i/440i/Supra/X3 F/G Chassis
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TCM B58 4.5" Race Downpipe BMW 240i/340i/440i/Supra/X3 F/G Chassis
TCM is proud to release the B58 Catless Downpipe for your BMW or Supra
Free Shipping within Continental US
A TCM Catless B58 Downpipe is an essential upgrade for any enthusiast looking to maximize the performance of their B58 engine.
Our downpipe is made from high-quality 304 stainless steal. It is designed to provide maximum exhaust flow and improve turbo spool time, resulting in increased horsepower and torque. By removing the factory catalytic converter and keeping a large internal diameter with a smooth transition down to the midpipe size, we're able to maximize exhaust flow and reduce air turbulence. Giving you more power.
Not only does this provide an increase in power, it also provides you with a nice increase in exhaust tone. Making your car sound more aggressive.
The catless design eliminates the restrictive catalytic converter, allowing for maximum exhaust flow and reducing backpressure. This results in a noticeable increase in power and throttle response, as well as a more aggressive exhaust note.
The TCM Downpipe is a direct bolt-on replacement for the factory downpipe, no need to make any cuts or alterations.
The downpipe is also designed to work seamlessly with the factory exhaust system, as well as aftermarket systems.
Features:
- Compatible with right-hand drive and left-hand drive vehicles
- Smooth bends for maximum airflow without any drone
- 304 stainless steel, which provides excellent durability and resistance to corrosion.
- Up to 30HP increase on the stock turbos, even more on upgraded turbos
- Lifetime warranty on defects and fitment
- 90 day return period
- All orders ship in 1-2 business days
- Fitment Guaranteed
- Flex section
Fitment:
Fits RWD and AWD
Fits B58 and B58TU (Gen1 and Gen2)
- 2016–2021 BMW 240/M240 F22/F23
- 2022-2024 BMW M240i G42
- 2016-2019 BMW 340i F30/F31/F34
- 2016-2019 BMW 440i F32/F33/F36
- 2020-2024 BMW M340i G20/G21
- 2016-2024 BMW 440i G22/G23/G26
- 2016-2024 BMW 540i G30/G31
- 2017-2023 BMW 640i G32
- 2016-2024 BMW 740i G11/G12
- 2018-2024 BMW 840i G14/G15/G16
- 2017-2024 BMW X3 M40 G01
- 2017-2024 BMW X4 M40 G02
- 2017-2024 BMW X5 M40 G05
- 2017-2024 BMW X6 M40 G06
- 2017-2024 BMW X7 M40 G07
- 2019-2024 BMW Z3 40 G29
- 2019-2025 Toyota Supra 3.0L A90/A91
Shipping
Shipping
Some items will ship directly from the manufacturer or distributor. We will process your order as soon as we can, to ensure minimal delay. Please note that sometimes our inventory system may show an item in stock, while the item is out of stock with the manufacturer or distributor. Should this happen, we'll contact the manufacturer to get a best estimate of when the item will ship out and reach out to you regarding next steps.
Please note that if the item is dropped shipped, the manufacturer may change the shipping carrier beyond our control. We will do our best to ensure you receive the same carrier and shipping time as purchased through us.
For international orders the buyer is responsible for any import duties or tariffs. This includes items shipped from abroad to you, such as KW, PTB
Items that show delivery status as "Delivered" that are Lost or Stolen Are Customers Responsibility.
Returns
Returns
You must reach out to us directly for all returns. If the product is unused and uninstalled, we can offer you a refund, or exchange. Returns must be initiated within 30 days(TCM Products have 60 days) of the product being ordered. Once the return has been approved, it is up to you to pack and return the product to the address provided. Return shipping costs are the buyers responsibility. Returns are subject to a 20% restocking fee. Items must be in like new condition.
Fuel items: we cannot accept returns on used fuel systems. This includes, HPFP & LPFP fuel pumps, port injection rails and ethanol analyzer kits.
Please note special order items or items that are built to order, once the item is in production the order cannot be cancelled or returned. Some examples of these products are Clutch Kits, Turbo charger kits, any ApexBuilt Product. If you are unsure if your product would be a special order item, please reach out to us. Contact US
TruCrane Motorsports(TruCrane Motorsports LLC) is not responsible for any products lost or damaged during the return shipping process.
Cancellations
Cancellations on orders of $1000 paid for using Shopify Pay Installments/Affirm are subject to a 3% cancelation fee. This is due to the large order processing fee associated with these sort of payments. TruCrane Motorsports, will cover the additional fees.
Cancellations on orders over $2000 paid for using Shop Pay, Credit Card, or PayPal are subject to a 2% cancelation fee.
Any purchase on our website constitutes acceptance of these conditions.
Warranty
Warranty
Terms and Conditions of TCM Products that state Lifetime Warranty on their product page. These products have a lifetime warranty against manufacture defects.
This covers things like cracks, and weld failures.
The warranty also does not cover:
- wear items, such as replacing a filter due to age.
- It does not cover dents, scratches, or holes from road debris.
- Improper install; rubbing against something or other issues from faulty installation.
- finishes, so if the finish wears, fades or chips off over time.
- catalytic converter blow out or damaged due to burbles/pop and crackle tunes.
If your item arrives damaged, please email us immediately along with photos of the product, damage and the shipping box.
Got a question?
Shipping Notice
Some oversized, heavy, or specialty items may incur additional shipping charges based on your delivery location. If this applies to your order, our team will contact you after checkout with the updated cost. Orders will not ship until additional charges are confirmed and paid.

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Shop confidently at our Revline Performance, where your safety and satisfaction are our top priorities.
$229.00
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TruCrane Motorsports
We are a specialty parts provider and performance shop based out of the Washington, DC area. We have been heavily involved in the car scene of DC, Maryland, & Virginia for well over a decade, including working with the SCCA, and multiple local car clubs and our local racetracks. TruCrane Motorsports specializes in aftermarket support for BMWs but we offer services for all cars.
At TruCrane Motorsports you'll find a level of customer service and support, beyond that of any other shop.
We have grown from selling parts and performing installations and maintenance, to also providing our own product line, TCM. TCM is the shop brand for TruCrane Motorsports. We took the same principles of our shop and applied them to our brand. That is why all TCM products have a fitment guarantee and lifetime warranty. We offer competitive pricing, to ensure you're not overpaying for a part.
We strive to provide quality products at a cost effective price.
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Curated from trusted manufacturers
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