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.
SLK55 M113 Long Tube Headers
No coating / Not included
$2,025.00
Sale price
$2,025.00
Regular price
$2,175.00
Skip to product information
R171 · M113
SLK55 M113 Long Tube Headers
The naturally aspirated M113 5.4L V8 is a fantastic power plant, and when paired with the lightweight chassis of the SLK55 AMG, it creates a true driver's car. However, the restrictive factory exhaust manifolds severely choke the engine's output. MBH...
- Chassis Mercedes-Benz SLK55 AMG (R171)
$2,025.00
Sale price
$2,025.00
Regular price
$2,175.00
- 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.
- Low end of the listed gain
- Top of the listed range
Listed gains · at the wheels
Horsepower gain
30 to 40 wheel horsepower gain
From this part’s specs: +30–40 whpShows the listed range, not a dyno sheet.
Inside the build
What sets these long tube headers apart
Fitment
Built for these cars
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R171R171M113
Your car on the list? You're good to go.
The details
Specs & details
The naturally aspirated M113 5.4L V8 is a fantastic power plant, and when paired with the lightweight chassis of the SLK55 AMG, it creates a true driver's car. However, the restrictive factory exhaust manifolds severely choke the engine's output. MBH Motorsports SLK55 AMG Long Tube Headers are the ultimate foundational upgrade for extracting maximum performance from this platform. As a standalone modification with zero other changes required, these headers unleash an incredible 30 to 40 wheel horsepower. In a chassis as compact and light as the SLK55, this massive increase in power dramatically transforms the power-to-weight ratio, delivering acceleration you can instantly feel and utilize on the track.
Lifetime Guarantee & Premium Materials
We engineer our headers to outlast the vehicle itself, and we back that up with a lifetime guarantee. Proudly handcrafted in the USA, this system is fabricated from heavy-duty 16-gauge T-304 American stainless steel. To ensure a perfect, leak-free seal against the engine block under extreme thermal stress, we utilize ultra-durable T-321 stainless steel flanges. If you are looking to start adding serious power to your SLK55 AMG, there is no better starting point on the market.
Key Features:
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Massive Standalone Power: Generates an impressive +30 to +40 wheel horsepower over stock with no other modifications required.
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Transformative Performance: Drastically improves the power-to-weight ratio of the lightweight SLK55 chassis for highly noticeable acceleration gains.
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USA 16-Gauge T-304 Stainless Steel: Proudly hand-fabricated in the USA for exceptional thermal endurance and maximum exhaust flow.
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T-321 Stainless Steel Flanges: Features heavy-duty T-321 flanges to prevent warping and guarantee a perfect seal against the cylinder head.
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Lifetime Guarantee: Engineered without compromise and fully guaranteed to last a lifetime of high-performance driving.
Compatibility:
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Engine: Mercedes-AMG M113 5.4L V8 (Naturally Aspirated)
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Chassis: Mercedes-Benz SLK55 AMG (R171)
Disclaimer: For off-road racing and competition use only. This product is not intended to be installed on a registered vehicle for use on public roads or highways and may never be installed on a registered or licensed vehicle for use on any public roads and highways.
No coating / Not included
$2,025.00
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?
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 R171 · M113. 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.