CLS 55 exhaust mods finished - Headers, De-Cat, X-Pipe, Resonator Removal
Just a short post for anyone with a CLS interested in modifying their exhaust and what I learnt from it.
I had lots of difficulty making my mind up on which way to go with the exhaust on the CLS.
So after watching various YouTube vids trying to find out what sound I wanted - everything apart from the rear boxes removed!
My fear was that doing this would make the car too loud and uncivilised.
I fitted Eurocharged manifolds, decat with the x pipe up the front (where the secondary cats and balance pipe are) and removed the resonator.
Whilst trying to figure out what sound I wanted, I realised that the placement of the X-Pipe had an effect on the sound. Having an X at the front where the secondary cats are gives you more of a high pitched machine gun sound with a stunning race v8 howl under medium load between 2-4k rpm. Whereas having an x at the back gives you a deeper and more burbly V8 sound.
After hearing the C63 note on a dyno at MSL on my first day of ownership, I figured I like the high pitch V8 sound so had my X towards the front. I removed the resonator too because I want maximum volume under load and don't mind putting up with a small burble providing I get maximum volume for the main events!
Here are a few clips on YouTube. I hope this helps for anyone considering doing the same to their CLS as I found it surprisingly difficult to get A-B comparison ideas.
Feel free to check my other vids if you're into tuning or ICE. My old 560BHP GTO is on there and even my old workhorse A6 subtle custom install that won a few contests.
Feel free to subscribe on YT as I'll be doing lots more to the CLS over the next 6 months.
Startup and Idle,
WOT run,
Cheers,
Tom


