siemon

i want be on safe side first thing

i dont want check engine light on

what i do secondary cat and resonator delete with stock primary car or both of them ?

exhaust with secondary cat and resonator delete. Both replaced by straights

siemon

no one

CarHopper

Sorry, nobody has modified the exhaust on this car yet. Let us know what your results are!

siemon

haha funny green kidney amg

what is you advance for first modified exhaust on this car with out check engine

siemon

should i remove first cat or secondary is enough any one help me ??

layzie12g

Remove the resonators and do not touch anything else.

siemon

why any problem if i remove second or first cat ?

siemon

؟؟؟؟

ENV²

Secondary cat delete with straight pipes. I hear it is the best way to keep AMG sound but higher volume without throwing any codes. Leave the resonator is what I was told cause if not it might get raspy.

SROC276

Just install an electric cut out between primary and secondary cats. If you want it loud then it's there....if not, close the valve and back to stock sound.

INS1GNIA

Yep, well said.

Siemon...everone is being extremely polite considering what you asked. I will be polite as well. Just like ENV², removing just the secondary cats and replacing it with straights will give you a deeper, healthier, more pronounced sound. Removing the resonator will give you a bit raspier sound, some like it, some don't. Removing both will make your car extremely loud and have a bit of rasp on it, again..mixed results with this. I have my secondary removed and straights in place of it and I love it. I would suggest doing that to start, if its not loud enough, remove the resonator next.

Also if you lower your rear seats, your car will open up 50% more, it really is a crazy easy mod.

QWKSNKE

Use the search function

avery.whss

i decatted mine straight piped right through...honestly its stupid loud and im pretty sure its illegal in most places to run no cats....i had 2nd cat delete before and it was nice..basically a deeper AMG note..if i were to do it again i'd just do 2nd cat delete with ROW boxes.

ArmoE55

Can you elaborate on this a bit please?

INS1GNIA

Lower your rear seats and find out . It's like a whole new car. The C63 is a good at eliminating outside noise, when you lower your rear seats, it frees up the whole inside to the exhaust noise.

gforc3

Those of you who have done the secondary cat delete, if you had a shop do it approx how long in labor did it take?

INS1GNIA

Mine was about 3-4 hours and cost around $320 for steel/straight pipes. It also depends on where you live, what shops are available and what material you use. You can expect the price to range from $150 - $500 and around 2-8 hours.

gforc3

Ahh ok thanks bro. I called a performance shop near me about a week ago looking to do it and was quoted an hour and a half or $180 then when I called to set up an appointment today all of a sudden it was $450. Maybe they meant per side before. Anyway thanks for your input appreciate it

sirius9

I had my resonator removed. Still maintained the V8 growl but louder. Not raspy.
I also had mine remap/tune to the Eurocharge map. So the throttle has been opened up a lot as well.

Didnt have the Secondary cat deleted as it may cause problems when i get my car MOT'ed (across the pond in GB, we need to have cars checked by government after 3 years old - annually to make sure its roadworthy)

avery.whss

the shop i went to took 8 hours and was about $800 bucks but i had both cats removed ..was told if it was just 1 cat it'd be roughly 3-4 hours and probably 300-400 ..so $450 doesn't sound too bad if it's for everything