mbcat

Hello, I just bought a 2016 C63S sedan and am new to the forum. I searched the forum and online and only found a few vendors for the x pipe to replace the 2nd cats. Can you please provide information on which one you have if you have made the switch? Also, I am interested in a generic one (maybe from summit racing?) that will fit the car if anyone has gone that route. I will be taking it into the shop anyway for welding to remove the resonators.

Thanks!
Travis

AlexZTuned

You do not add an X-Pipe to replace the secondary cats. The C63S has downpipes, not headers... so the secondary cats are located at the end of each downpipe. After that, there is a valved H-Pipe.

You're more than likely looking at W204/last-gen C63 parts... for the W205 C63S, you simply cut out the secondary cats and replace with straight pipe. No crossover.

SuperNik

The secondary cats are part of the down pipes. I think the valved H or X pipe is part of the mid pipe section of the exhaust. As far as I know nobody sells a pipe that's just to replace the secondary cats as you need to cut into the dp's unless removing them completely.

mbcat

Thanks for the quick replies guys. I could not find any pictures of the oem exhaust. I will take a look under the car and make sure I am confident in what I end up telling the muffler shop.

RDO247

Factory Performance Exhaust - Rear to Front
Factory Performance Exhaust - Front to Rear
Valved H-Pipe (Solenoid removed)