Looking for more exhaust flow, better sound, and improved performance without wanting to deal with a Check Engine Light? No CEL Guarantee Downpipes are designed for BMW enthusiasts who want the benefits of an upgraded downpipe while having added protection against a catalytic-converter-related CEL.
Aftermarket downpipes are one of the most popular performance upgrades for turbocharged BMWs. Replacing the restrictive factory downpipe with a high-flow catted design can improve exhaust flow, turbo response, and exhaust sound while supporting additional performance modifications.
Why Choose No CEL Guarantee Downpipes?
One of the biggest concerns with aftermarket BMW downpipes is the possibility of triggering a Check Engine Light (CEL). No CEL Guarantee Downpipes are designed specifically for BMW owners who want increased exhaust flow and performance without accepting the hassle of a potential catalytic-converter-related CEL.
The available MAD No CEL Guarantee downpipes feature high-flow catalytic converters and are designed as direct-fit upgrades for specific BMW applications. If a qualifying catalytic-converter-related CEL occurs, the applicable MAD No CEL Guarantee provides replacement coverage according to the product’s warranty terms.
BMW B58 No CEL Guarantee Downpipes
M240i, 340i, M340i, 440i, M440i, 540i & More
For BMW B58 owners, the MAD BMW F & G Chassis 5” B58 Catted Downpipe with No CEL Guarantee is a high-flow upgrade designed for a wide range of B58-powered BMWs.
This downpipe features a 300-cell high-flow catalytic converter, smooth piping, a flex section, and direct-bolt-on fitment. It’s designed to increase exhaust flow while providing a more aggressive exhaust note and improved throttle response.
Fits applications including:
- 2015+ BMW M240i
- 2016–2019 BMW 340i
- 2020–2024 BMW M340i
- 2016+ BMW 440i
- 2016+ BMW 540i
- 2016+ BMW 740i
- 2017–2020 BMW X3 M40i
- 2017–2020 BMW X4 M40i
- 2019+ BMW X5 40i
- 2019+ BMW X7 40i
- 2019+ BMW Z4 M40i
- Toyota Supra 3.0L
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BMW G8X M2, M3 & M4 S58 No CEL Guarantee Downpipes
G80 M3, G82/G83 M4 & G87 M2
For the latest generation of BMW M cars, the MAD S58 Catted Downpipes with No CEL Guarantee provide a high-flow solution for the S58 platform.
Featuring 300-cell high-flow catalytic converters, 304 stainless-steel construction, smooth bends, and a flex section, these downpipes are designed to improve exhaust flow, sound, throttle response, and overall performance.
Fits:
- 2021+ BMW G80 M3
- 2021+ BMW G82 M4
- 2021+ BMW G83 M4
- 2023+ BMW G87 M2
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BMW X3M & X4M S58 No CEL Guarantee Downpipes
F97 X3M & F98 X4M
The S58 isn’t limited to BMW’s M2, M3, and M4. The MAD S58 Catted Downpipes for the F97 X3M and F98 X4M offer a high-flow upgrade for BMW’s S58-powered SUVs.
These downpipes feature 300-cell high-flow catalytic converters, 304 stainless-steel construction, smooth mandrel-bent piping, a flex section, and a No CEL Guarantee.
Fits:
- 2020+ BMW X3M F97
- 2020+ BMW X3M Competition F97
- 2020+ BMW X4M F98
- 2020+ BMW X4M Competition F98
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BMW F90 M5 & F9X M8 S63 No CEL Guarantee Downpipes
F90 M5, F91/F92/F93 M8
For S63-powered BMW M cars, the MAD F9X M5/M8 Catted Downpipes with No CEL Guarantee provide a high-flow catted upgrade designed specifically for the F9X platform.
The downpipes feature 300-cell high-flow catalytic converters, 304 stainless-steel construction, smooth bends, and a flex section. They’re designed to improve exhaust flow, turbo spool, throttle response, and exhaust sound while providing a No CEL Guarantee for qualifying catalytic-converter-related CELs.
Fits:
- 2018+ BMW F90 M5
- 2018+ BMW F90 M5 Competition
- 2018+ BMW F91 M8
- 2018+ BMW F92 M8
- 2018+ BMW F93 M8
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Upgrade Your BMW Without the CEL Headache
A downpipe upgrade can completely change the sound and character of a turbocharged BMW. Whether you’re driving a B58-powered BMW, G8X M2/M3/M4, F97/F98 X3M/X4M, or F9X M5/M8, there are No CEL Guarantee options available for several of BMW’s most popular performance platforms.
Shop No CEL Guarantee Downpipes at bmwmpower247.com and upgrade your BMW with increased exhaust flow, a more aggressive exhaust note, and performance-focused hardware backed by a No CEL Guarantee.
Find the right downpipe for your BMW and start building your setup today.