Exhaust Headers for Mercedes Benz SL55 AMG (2003-2008) 5.4L Supercharged V8

High-Flow Mid-Length Exhaust Headers for 2003-2008 Mercedes Benz SL-Class (M113K / R230)

Designed for competition use, these mid-length exhaust headers eliminate severe factory exhaust restrictions to drastically reduce back pressure and unlock top-end power.

The Stock SL-Class Exhaust Bottleneck

The factory M113K and M113 exhaust manifolds are notoriously restrictive, utilizing a cast log-style design that forces exhaust pulses to collide. This inefficient scavenging creates excessive back pressure and elevated combustion chamber temperatures, fundamentally choking the 5.4L V8. On supercharged applications under heavy load, this bottleneck prevents efficient gas evacuation, causing extreme heat soak, high-RPM power fade, and a muffled exhaust note that fails to reflect true AMG performance.

The Engineering Solution

These mid-length headers maximize exhaust evacuation using wider primary tubes that promote a smooth, high-velocity transition of exhaust pulses into the collector. On the supercharged M113K, the wider primaries pull spent gas out of the cylinders faster so the blower is no longer fighting backpressure, worth up to 15 percent more horsepower and torque (naturally aspirated V8s typically see 7 to 10 percent). The kit includes downpipes and must be professionally welded to your existing exhaust system. These headers are built specifically for the R230 SL55 AMG; routing around the transmission tunnel is tight, so plan for a careful, professional install. Strictly for off-road and competition use.

Technical Specifications

Compatibility

• 2003-2008 Mercedes-Benz SL55 AMG (R230) 5.4L Supercharged V8
• Fits Left-Hand Drive (LHD) and Right-Hand Drive (RHD) vehicles

The Mercedes Benz Precision Standard

For high-performance European platforms, reducing thermal load and eliminating exhaust flow restriction is paramount. These headers deliver the aggressive AMG bark and unrestricted power delivery required for competitive track use, ensuring your supercharged V8 performs at its absolute peak without compromise.

Common Questions

Will these fit my 2005 SL55 AMG?
Yes. They are built for the 2003-2008 SL55 AMG R230 with the 5.4L supercharged M113K.

Do they fit the SL500?
No. They are made for the 5.4L supercharged SL55 AMG.

Are they bolt-on?
The headers bolt to the heads, and the included downpipes are professionally welded to your existing exhaust.

Are downpipes included?
Yes. The kit includes the headers, downpipes, gaskets and hardware.

How much power do they add?
Up to 15 percent more horsepower and torque on the supercharged M113K, from cutting the backpressure of the cast factory manifolds.