MAD BMW Toyota B58 5" Catless Downpipe M240/340/440/Supra
Tax excluded. Shipping calculated at checkout
Meet the MAD B58 Fat Boy 5'' catless downpipe.
The MAD 5 inch Catless B58 Downpipe is a high-performance aftermarket upgrade for BMW B58 engine vehicles, designed to increase power and torque while improving exhaust flow. This downpipe is made from premium quality stainless steel and is precision-engineered to fit perfectly with the stock exhaust system, ensuring a seamless installation process.
With a 5 inch diameter, this downpipe provides unrestricted exhaust flow, which reduces backpressure and increases horsepower and torque output. It also features a catless design, which eliminates the factory catalytic converter for even more performance gains. This makes it an ideal choice for car enthusiasts who are looking to improve the performance and sound of their BMW B58 engine vehicles.
The MAD 5 inch Catless B58 Downpipe is designed to withstand the high temperatures and pressures of high-performance driving, ensuring reliable performance for years to come.
Installation of the MAD 5 inch Catless B58 Downpipe is straightforward and can be completed with basic hand tools.
Overall, if you're looking to improve the performance and sound of your BMW B58 engine vehicle, the MAD 5 inch Catless B58 Downpipe is a must-have upgrade. It delivers significant performance gains while also adding a much needed sound improvment.
Expect up to a 30HP increase on a tuned BMW / Toyota Supra B58 with stock turbo, even more on cars with upgraded turbo.
Features:
- Compatible with right-hand drive and left-hand drive vehicles
- Smooth bends for maximum airflow without any drone
- 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
- Spot on fitment
- Flex section
Fitment:
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2015+ BMW M240i & Xdrive
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2016-2019 BMW 340i & Xdrive
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2020+2024 BMW M340i & Xdrive * Does not fit 2025 *
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2016+ BMW 440i & Xdrive
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2016+ BMW 540i & Xdrive
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2016+ BMW 740i & Xdrive
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2017-2020 X3 M40
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2017-2020 X4 M40
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2019+ G05 BMW X5 40i & xDrive
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2019+ G29 BMW Z4 M40i
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2019+ Toyota Supra 3.0L
FAQ
At T1 Motorsports, Not only do we specialize in aftermarket parts, but we also specialize in all mechanical repairs. We are a full-service mechanical shop, with skilled technicians geared towards OEM and Aftermarket enthusiasts.
How Long Will It Take to Receive My Order?
Shipping times depend on your location and our inventory levels.
- In-Stock at T1 Motorsports Orders: Orders for in-stock items will be shipped out on the same business day.
- Out-of-Stock & Distant Warehouse Orders: If an item is not in stock or is located in a warehouse, it will take 2-3 weeks to arrive at our facility before being shipped using the method selected at checkout.
- Order Tracking & Confirmation: Delivery details, including tracking information, will be provided in your confirmation email once the order has shipped.
For any shipping-related questions, please contact T1 Motorsports customer support.
My Order Is Taking Longer Than Expected. What Can I Do?
At T1 Motorsports, we strive to ensure every customer is satisfied with their experience.
- Before your order is confirmed, you will receive an email with the estimated arrival time (ETA) for your shipment.
- While we do our best to meet all delivery expectations, unexpected delays may occur. Rest assured, our team is always here to help and resolve any issues.
- If you have any concerns regarding your order, please contact us directly, and we’ll work to find the best solution for you.
What Is Your Order & Shipping Policy?
It is your responsibility to provide accurate shipping information at checkout. T1 Motorsports is not liable for any delays, lost shipments, or additional costs resulting from incorrect or incomplete addresses submitted during ordering.
What Is Your Return & Exchange Policy?
All processed orders that have not shipped will incur a 6% processing fee, this is mainly to cover any payment processing and cancelation fee with the manufacturer or warehouse. A processed order is an order that has already been put in our system and the product has been taken out of inventory and moving towards the packing and shipping face.
On special order or custom-made orders, the processing face is indicated when the manufacturer has received our order. Please be courteous and notify us ASAP if you wish to cancel any order(s) that were recently placed in order to prevent it from shipping out.
Due to the nature of racing and performance vehicles, no returns will be accepted on special order items, opened, installed, incomplete, or otherwise used products. If a product is ordered and not wanted, the UNUSED item can be returned within 30 days after the product has been delivered. This does not apply to SPECIAL ORDER items. Once the product is returned, you have two options for your refund:
You may have your purchase refunded back on your original payment method minus a 20% restocking fee of the total amount. In this case, please know that the initial shipping is not refundable (free shipping items still incur shipping chargers which MUST be deducted on a return). All items wanting to be returned MUST be reported within 30 days of delivery date. If you are still browsing and want an alternate product, we can provide you with a full credit minus shipping costs as a T1 Motorsports store credit. Some brands are excluded and may incur up to a 10% restocking fee. Please contact us to confirm.
On both refund options, a return shipping label may be provided if you are unable to ship the product(s) back using your own method of shipping. This shipping cost will be deducted from your total refund or credit.
What Should I Do If My Ordered Product Doesn't Fit?
We strive on making our fitment guide perfect. If you have any fitment issues regarding your product, please contact us by email or phone and we will solve your issue.
What is Your Order Pickup Policy?
- Once you receive an email confirming that your order is ready for pickup, you may collect it at our store during regular business hours.
- If you wish to designate someone else to pick up your order, please notify us via email with their full name. They will need to provide a valid ID at the time of pickup.
- To expedite the process, please bring your order number when arriving at the store.
- You have 60 days from the date your order status is updated to "Ready for Pickup" to collect your order, unless a different pickup date has been agreed upon.
Orders not picked up within the 60-day window will be deemed abandoned and canceled. No refunds will be issued for abandoned orders.
Armstrong G
Had a great experience purchasing winter tires and rims here. Straightforward communication, promise delivered.
AeroWolf
Picked up my exhaust from T1 Motorsports. Awesome customer service from beginning to end. Every email I sent received a response very quickly and they were very informative and polite. Highly recommend for high-end parts!
Sandra G
Excellent experience with T1 motorsports. They were super responsive, very flexible with their service despite the holiday season and had competitive prices with knowledgeable staff