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Exhaust› Exhaust Pipes, Systems and Components

MST

6-Inch Catted Downpipe

$1,592.80 $1,388.00 Save $204.80

SKU: BW-5807DP

In Stock
In Stock
Ships by Sep 12
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The MST 6" Catted Downpipe is a high-efficiency exhaust component designed for BMW/Toyota B58 3.0T engines. This downpipe aims to enhance vehicle performance by reducing exhaust pressures and temperatures. It features a large diameter design with a 6-inch, Euro 6, 400-cell catalytic converter, offering efficiency comparable to straight pipes.
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The MST 6" Catted Downpipe represents a significant upgrade for the BMW/Toyota B58 3.0T engine, boasting one of the highest efficiencies globally. Engineered for performance enthusiasts, this downpipe is crafted to deliver increased horsepower and torque, with dyno tests on stock vehicles showing gains of 18-25hp and 4kgm, and further enhancements for tuned vehicles. Constructed with a focus on maximizing flow, it features the largest diameter downpipe available for the B58 engine worldwide and a 6-inch Euro 6 400-cell catalytic converter. This design not only boosts performance but also aims for cleaner exhaust emissions. It is compatible with vehicles capable of supporting 1000hp or more and is available in versions for both GPF (Gasoline Particulate Filter) and non-GPF equipped cars, with CNC adapters tailored for larger turbochargers. This downpipe is specifically designed to fit a range of BMW and Toyota models, including the 2016+ F20 BMW M140i, 2016+ F22 BMW M240i/M240ixDrive, 2016+ F30/F31/G20 BMW 340i/340i xDrive, 2016+ F32/F33/F36/G22/G23/G26 BMW 440i/440i xDrive, 2016+ G30/G31 BMW 540i/540ixDrive, 2016+ G11/G12 BMW 740i/740ixDrive, 2019+ A90/A91 Toyota Supra, and 2022+ G42 BMW M240i.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandMST
Part NumberBW-5807DP
CategoryExhaust

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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