Merc63

Says that there is a "sound pipe mod"

Does anyone know what that consists of?

Anyone running the Renntech ECU2 tune?? Im thinking of pairing that or Kleeman K2 tune with the MHP LT headers..

sflgator

Although I do not know what the stage 3 "sound pipe" mod is, I'm now running the RENNtech stage 2 ecu flash tune ...

https://mbworld.org/forums/c63-amg-w...y-capable.html

dmyrick

Kleeman K2 comes with the headers, i think what you want is the kleeman ecu upgrade with mhp lt headers

-michael-

I have PKG 3 on my car.
Sound mod is basically secondary cat removed and replaced with Rentech pipe (maybe there are some internal ribs or curves inside that pipe that make it sound "special"). However I have not heard a C63 without sec cat, maybe there is not much difference.

x838nwy

Is the pipe as bolt-on set up or is cutting & welding required?

Thanks in advance.

C

Merc63

So you just have the Renntech stage 2 tune? I take it you are very happy with it still?? Was it worth the money?

I've been reading lots about tuning and have decided to pay the extra bucks and go with the guys that seem to know the most about doing it.

James@ACG

it is a bolt on setup, basically completely replaces the whole section from the flanges on the downpipe to right before the resonators. I will take a picture for you guys later today, as we have one at the shop.

Here is a picture provided by renntech


We also have the RENNtech airbox in stock and available as well.

James@acg

sflgator

Yes, very happy w/ the RENNtech stage 2 ecu flash. . PM me and I'll put you in touch w/ the RENNtech sales mgr and/or owner/president of RENNtech; these guys know their ***** and will answer any questions you may have.

clktoc63

Any update here? Pricing perhaps? Would this throw a CEL with a stock tune?

James@ACG

No cel, as the sound pipes are installed after the post cat o2 sensors. Price is $2440

C63newdude

Don't blame me or take it personal but that is an insane and absurd amount of money for what it is. my .2c

Sincity

Agreed. But is looks purdy.

sflgator

So how much are the typical "straight" pipes (resonator delete) including install?

clktoc63

From my experience on this site:
1 Billion dollars from a tuner or $150 from a muffler shop.

(No offense to anyone...)

Sincity

I was thinking of replacing my secondary cats with a T304 SS perforated core resonator from Vibrant but several members said it really doesn't add power. This is a very high quality piece that I have used before. The shortest they sell is 12" overall length with a 4" round body at about $57 each. The core is a perforated tube unlike a glass pack.

mthis

My shop charged me 200. Resonator delete and 2nd car delete. Replced with 2 str8 pipe.

mthis

Do u have the long tubes or the shorty's. And what where u Gains?

Unbreakable1

most ppl here have gone w/ straight pipes...anybody have experience w/ x-pipes instead of straight pipes?

mthis

I belive some vendors in this forum sell a 3inch and 2 1/2inch xpipe. I forgot who bit will check

Unbreakable1

how do you feel about the performance btwn the two types, str8 vs x-pipe....im currently trying to decide if the x-pipe is worth the extra $$

mthis

Well my car is not stock and my friends is. I have str8 pipe with no 2nd cats. He had no 2nd cats and x pipe. Sound wise mine is alot louder. As far as performance I would say x pipe with no 2nd cats will show some gains.

HIRO63

I put on X-Pipe for my car.

I heard that X-Pipe gives you more torque.

This one was 147,000 yen so its around 1,615(USD)

It really sound good.

Jae Duk

Where did you get it from? They look like bolt ons if I'm not mistaken

HIRO63

They are made in Japan. Shop called First.

You do have to cut it and replace it

Unbreakable1

thanks guys...looks like ill be spending the extra money for a x-pipe, however minimal the gain may or may not be...