Below is information direct from Germany regarding this product.
It may show additional information about fitment and specification.
Downpipe Kit with 300CPSI Racing Catalyst Converter (Precat) and 2nd Catalyst-Dummy.
Mercedes Benz W205 AMG C63 (S) 350-375KW/476-510PS
Mercedes Benz S205 AMG C63 (S) 350-375KW/476-510PS
made out of high quality stainless steel cast 1.4301 (SS304)
with 300CPSI precatalyst for maximum performnace (optional without catalyst converter)
catalysts with high quality EURO 6 coating
2nd catalyst-dummy (optional with 100-300CPSI catalyst converter)
complete 2x Ø76mm (3inch)
CAD-designed and flow optimizied
2 lambda probe connections for each downpipe
100% perfect fit, plug and play
less thermal load on the turbocharger
more power by reducing back pressure
significantly higher torque
compatible to stock exhaust system
each downpipe includes 2 pieces, installation and disassembling without removing transmission