MERCEDES C219 CLS 55 AMG V8 (M113 5.5L - 476 Hp) '04 -> '06

OEM
Claimed data:
Horsepower 476 Hp at 6100 rev/min
Torque 700 Nm a 4500 rev/min
Actual data:
Horsepower 493,1 Hp a 6660 rev/min
Torque 715,7 Nm a 3745 rev/min.

Supersprint:
Manifold 844901
Metallic catalytic converter Right 845102
Metallic catalytic converter Left 845122
Centre exh. 845103
Rear exh.Right – Left 845507-845537
Actual data:
Horsepower 537 Hp at 6615 rev/min
Torque 753,3 Nm at 3695 rev/min.

Stock Vs Supersprint.

Resonator

The Supersprint resonator is completely flow-thru design, just like the Supersprint rear mufflers. It's also available in an optional, race-pipe version (non-resonated).
Both parts use the world-known Supersprint, built-in X-pipe, a special crossover section, placed at the ideal distance from the engine, which equalizes the exhaust gas backpressure between the right and the left side cylinder banks of the Mercedes V8 motor.
The X-pipe refines the sound at all rpm ranges, enhancing the harmonic of the engine exhaust waves, and guarantees a healthy, sport sound. The Supersprint mid-pipe kit has been made with substantially larger than stock, Oversize tubes (2 x 70mm Vs. the smallish 2 x 60mm found on the oem exhaust), for an effective increase in exhaust gas flow.

Headers

The key component of the Supersprint CLS 55 AMG exhaust, instrumental to best performance, are the headers. These very special headers have been designed and developed by Supersprint' own R&D team, as usual, and have been extensively tested on Supersprint own MAHA braked dynamometer.
While the stock headers use an ineffective log design, with extremely short, restrictive runners, made out of stamped, metal halves, the Supersprint headers feature long, 42mm o.d. tubular, individual primaries, mated together smoothly, thanks to the special, 4-1 Supersprint 70mm o.d. merge collector design.
As a comparison, the stock headers and the inlet pipe leading to the cats have a main section of only 46mm, this means that the Supersprint headers have a 110% wider cross-section in this particular, most critical area.
The Supersprint development crew managed to squeeze these huge headers in the limited space available in the engine bay, and shaped them so well, that they can be easily fitted without the need for lifting the engine, or un-bolting the transmission or other parts.
The heat expansion of the exhaust system is a very critical factor on these S/C engines, and it often leads to the failure of one or more components, if the design does not take it into the proper consideration.
The Supersprint headers, with their proprietary free-floating flanges and spring-loaded sealing rings, effectively neutralize all of the heat induced tensions placed on the individual pipes; provide the ideal resistance of the entire system to the thermal cycles, and a maintenance-free, long life.
The simple, yet effective leak-free design makes the Supersprint headers the only real performance headers on the market, which offers the same oem-comparable, or even better reliability in the long term.