LP560-4

I want the louder sound that can come with adding high flow cats + headers but do not want to add headers yet (only 2500 miles). I am looking to do a ECU tune very soon but I would also like to make the sound louder (stock sound). I've called Kleemann and they said their high flow cats only work with their headers. Is there a simple exhaust mod that I can do to make my sound loud while I fully break my car in before adding headers?

Azn_C300

straight pipe

hhughes1

^^^^^^ in place of the secondary cats located midway down the vehicle

LP560-4

Who makes straight pipes for the c63? Does this require some cutting/welding? And when I decide to add headers and high flow cats later down the road, would there be any issues such as fitment or more cutting and welding needed?

mthis

my car is as loud as it gets with out headers. click on the link if you want lot of vids.

LP560-4

and what exactly have you done?

mthis

2nd cat delete and resonators deleted

hhughes1

These are not in the proximity of the manifolds and primary cats. There are no O2 sensors involved either. Just in front of the resonator, they are side by side and can be cut out and straight pipe welded into place. This pic of the exhaust that I am selling shows the deletion clearly just past the elbow at the opposite end from the cats(left).

C63newdude

What is the piping size of the stock oem exhaust on the C63?

LP560-4

I'm sorry but are they the same thing? Does putting in straight pipes mean removing the resonator?

C_63_UAE

I wish I could delete my secondary cats like this.. Anything like this would undoubtedly void the warranty over here!

ATKM5

The exhaust goes as follows:
Headers => Primary Cats => Secondary Cats => Resonator => Muffler...

To make the car louder, just remove the Secondary Cats + the Resonator. The stock pipes are 2.75", so you can either use the same size straight pipes or upgrade to 3".... Most shops do 3" anyway, at least here where I'm from...

JM

Well also depends what kind of sound you are looking for...

I kept my resonator and mine sounds like this...

http://www.youtube.com/watch?v=BWc3vq9SCQA

That with 3" pipes, cats are out

X pipe where 2nd cats are

Brian GT PRO

We make a Single X R1 that is a Resonator removal X-pipe. Sorry, ruthless plug LOL. http://boostedbimmers.com/shop/produ...Single-X-R1%22

LP560-4

How do they compare to straight pipes?

LP560-4

Does your X pipe for the c63 sound like Jeffield's above? What is the difference from just adding straight pipes?

Also, I see you are located in Fullerton, do you have the X pipes in stock? Can I pick them up if I were to purchase them?

CPD SLK

I thought we had 2.5"pipes

Sincity

I believe we do have 2.5" pipes.

ATKM5

My CLS63 has 2.75" pipes... I assumed the exhaust would be the same.. My bad then...