Verified
Spools like a different car
Backpressure gone. Boost comes in a full 400rpm sooner and it pulls all the way to redline now. Fitment was dead-on — no massaging, no fighting the O2 bungs.
Marcus D.
CLS63 Biturbo Downpipes
$999.00
Sale price
$999.00
Regular price
$1,350.00
Skip to product information
W218 · M157
CLS63 Biturbo Downpipes
The Mercedes CLS63 AMG Biturbo is an absolute powerhouse, but its true potential is heavily suppressed by restrictive factory exhaust hardware. MBH Motorsports CLS63 AMG Biturbo Downpipes are arguably the highest-quality downpipes available on the market today for this platform....
- Engine Mercedes-AMG M157 5.5L V8 Biturbo
$999.00
Sale price
$999.00
Regular price
$1,350.00
- Made in the USAPhoenix, Arizona
- Hand TIG-weldedMiller Dynasty
- Lifetime warrantyUncoated headers & downpipes
On the dyno
What it puts down.
The gains listed for this part, measured at the wheels. Your numbers will move with the car, fuel and tune.
- Listed gain
Listed gains · at the wheels
Horsepower gain · with ECU tune
100 wheel horsepower gain
Torque gain · with ECU tune
175 wheel torque gain
From this part’s specs: +100 whp · +175 wtqShows the listed range, not a dyno sheet.
Inside the build
What sets these downpipes apart
Fitment
Built for these cars
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W218W218M157
Your car on the list? You're good to go.
The details
Specs & details
The Mercedes CLS63 AMG Biturbo is an absolute powerhouse, but its true potential is heavily suppressed by restrictive factory exhaust hardware. MBH Motorsports CLS63 AMG Biturbo Downpipes are arguably the highest-quality downpipes available on the market today for this platform. Engineered to be the ultimate key to unlocking the hidden power of your M157 engine, these downpipes replace choked OEM piping with smooth, high-flowing 3-inch tubing.
By dramatically reducing backpressure directly off the turbochargers, this system allows for massive performance increases and immediate throttle response. When paired with ECU tuning, this upgrade delivers staggering gains of over 100 wheel horsepower and over 175 ft-lbs of wheel torque, transforming your CLS63 into a true supercar killer.
Handcrafted USA Quality & Complete Fitment
Every set of MBH CLS63 downpipes is proudly handcrafted right here in the USA using premium USA 16-gauge 304 stainless steel. Built to withstand extreme exhaust temperatures and outlast the life of your vehicle, this heavy-duty system is designed for a flawless fit. To ensure a seamless installation process, the kit includes all the necessary high-quality hardware and heavy-duty clamps needed to get the job done right. Furthermore, these downpipes are precision-engineered to perfectly accommodate both AWD (4MATIC) and RWD drivetrain configurations.
Key Features:
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Supercar-Level Gains: Unlocks over +100 WHP and +175 WTQ at the wheels when paired with performance ECU tuning.
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USA 16-Gauge 304 Stainless Steel: Proudly hand-fabricated in the USA using premium American stainless steel for lifetime durability and thermal strength.
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High-Flow 3-Inch Tubing: Maximizes exhaust gas velocity and rapid turbo spool, eliminating severe factory bottlenecks.
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Universal Drivetrain Fitment: Precision-engineered to flawlessly fit both All-Wheel Drive (4MATIC) and Rear-Wheel Drive (RWD) CLS63 AMG models.
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Complete Installation Kit: Includes all required hardware and premium clamps for a straightforward, hassle-free install.
Compatibility:
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Engine: Mercedes-AMG M157 5.5L V8 Biturbo
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Chassis: Mercedes-Benz CLS63 AMG (W218 Biturbo - AWD & RWD)
Disclaimer: For off-road racing and competition use only. This product is not intended or legal for installation on registered, licensed vehicles operated on public roads or highways.
$999.00
Questions about this part?Email us your question or VIN.
Email us
Email us
Straight from the owners
Built, bolted, proven
Real cars. Real dyno sheets. Here's what owners say after the headers go on.
5.0 / 5
3 verified builds
Ready for yours?
Complete your W218 build
Before you order
Straight answers
The questions we get asked most.
Still not sure?
Email us your question or VIN and we'll confirm fitment before you order.
sales@mbhmotorsports.com
Will this fit my car?
It's built for W218 · M157. Pick your car in the fitment check at the top of this page to confirm. Not listed, or engine swapped? Email us your VIN and we'll confirm fitment before you order.
Is there a warranty?
Yes. Headers and downpipes we build carry a lifetime warranty (coated or painted finishes excluded). Email us with any warranty question.
Where is it made?
Right here in the USA, in our Phoenix, Arizona shop.
Can I ask a question before I order?
Yes. Email us with your car and your question and we'll get back to you. If you're unsure about fitment, include your VIN.