More exhaust note

[FatTony001]

I removed my resonator last year, best mod for 60$ btw I was looking this year to upgrade my exhaust sound a little more... What's next to achive that?

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[AMS Performance]

high flow 2nd cats and high performance headers. Keep the stock AMG exhaust.

[FatTony001]

Good to know
thanks

What's a good 2nd cat? ( I guess we have 2 cat...)

How much costs high flow cats and headers?
How much hp for high flow cats and headers?
Which one sounds more?

thx for the help AMS

[AMS Performance]

Originally Posted by FatTony001

Good to know
thanks

What's a good 2nd cat? ( I guess we have 2 cat...)

How much costs high flow cats and headers?
How much hp for high flow cats and headers?
Which one sounds more?

thx for the help AMS

Headers make roughly 23HP/25TQ and high flow secondary cats make another 10HP/12TQ.

For more information regarding the headers:

http://www.abedinmotorsports.com/headers.htm

~AMS~

[GiZzO]

AMS,
Would you recommend 200 or 300 metal cell cats? And why?
deleting the cat completely along with the resonator, do you loose low end torque?

[FatTony001]

good question


soo

Headers is 1200$ + install ( I guess 4h at 100$ )
= a meaner sound

High flow cat... what's that ... $?
(I think it's illigal to delete and has a bad exhaust sound )

[M-bENZ]

YEA...whats that ? lolz

Andy

[AMS Performance]

Originally Posted by GiZzO

AMS,
Would you recommend 200 or 300 metal cell cats? And why?
deleting the cat completely along with the resonator, do you loose low end torque?

The different between 200-300 is almost negligible, however 200 cells can sound slightly raspier which is why I always opt for 300-cell metal core cats. make sure they are metal core cats (longer lasting).

There is no point in deleting the resonator honestly. Both the Resonator & muffler are AMG components and are a straight through free flowing design, whereas, the exhaust manifolds & cats are off the shelf standard mercedes components (and much more restrictive).

With performance headers & high flow 2nd cats installed you will really want to have that stock resonator in place because it helps clean up the sound significantly. In addition, from a more ethical/moral stand point, Keeping your secondary cats will help clean up the emissions more so than deleting them all together and its 100% legal to put in high flow cats, its 100% illegal to delete them so from that perspective the choice is quite obvious. Most high flows are at least 49-state legal, some are even 50-state legal.

Here are the cats recommend, they are 300-cell metal core cats. Price is $180 shipped for the pair (x2), simply email the seller & tell them you are from a mercedes forum and would like to purchase two for $180 shipped, they will accept. These exact cats made 10HP/12TQ @ wheels on NA 55 AMG on bone stock exhaust.

http://cgi.ebay.com/ebaymotors/High-...205|240%3A1318

(AMS has no affiliation with the cat seller, just a recommendation that's all).

Hope that helps,
~AMS~

[FatTony001]

Thanks alot on the info AMS

and the point of the thread...

Will these high flow cats increase the exhaust sound on a good note?

I guess on a 55 NA AMG it's 3" inlet/outlet

[MARTYMAR]

Originally Posted by AMS Performance

The different between 200-300 is almost negligible, however 200 cells can sound slightly raspier which is why I always opt for 300-cell metal core cats. make sure they are metal core cats (longer lasting).

There is no point in deleting the resonator honestly. Both the Resonator & muffler are AMG components and are a straight through free flowing design, whereas, the exhaust manifolds & cats are off the shelf standard mercedes components (and much more restrictive).

With performance headers & high flow 2nd cats installed you will really want to have that stock resonator in place because it helps clean up the sound significantly. In addition, from a more ethical/moral stand point, Keeping your secondary cats will help clean up the emissions more so than deleting them all together and its 100% legal to put in high flow cats, its 100% illegal to delete them so from that perspective the choice is quite obvious. Most high flows are at least 49-state legal, some are even 50-state legal.

Here are the cats recommend, they are 300-cell metal core cats. Price is $180 shipped for the pair (x2), simply email the seller & tell them you are from a mercedes forum and would like to purchase two for $180 shipped, they will accept. These exact cats made 10HP/12TQ @ wheels on NA 55 AMG on bone stock exhaust.

http://cgi.ebay.com/ebaymotors/High-...205|240%3A1318

(AMS has no affiliation with the cat seller, just a recommendation that's all).

Hope that helps,
~AMS~

I just sent an email to have 2 of these cats ordered hopefully by today! I'm also seriously considering the headers...

[M-bENZ]

so any update on your ECU MARTYMAR ? lolz u know what im talking about..

Andy

[MARTYMAR]

Originally Posted by M-bENZ

so any update on your ECU MARTYMAR ? lolz u know what im talking about..

Andy

Naw man...I'm going to wait until we meet so you can show me how to do it! lol...no hurry

[M-bENZ]

Originally Posted by MARTYMAR

Naw man...I'm going to wait until we meet so you can show me how to do it! lol...no hurry

LOL aite...Anyway I'm leaving on 26 I'll pm you when I get there and Klinh too he told me he lived somewhere around there too...cant wait to see you guys .

Andy

[MARTYMAR]

I've heard nothing back from AMS contact regarding the 300 cell cats. What's up with that? I emailed Magnaflow yesterday and haven't heard anything. I could just buy them for $195 and forget about the small savings but I figured I'll give it a try since I seldom buy parts through a sponsor recommendation like this....

[MARTYMAR]

Originally Posted by MARTYMAR

I've heard nothing back from AMS contact regarding the 300 cell cats. What's up with that? I emailed Magnaflow yesterday and haven't heard anything. I could just buy them for $195 and forget about the small savings but I figured I'll give it a try since I seldom buy parts through a sponsor recommendation like this....

Finally I heard back from Jim today but decided not to change the cats because they're illegal in California....aftermarket that is. I could get my car impounded if they're found on my car. With my luck I'll get caught so I decided to not do it..dam....time for another plan....

[AMS Performance]

Originally Posted by FatTony001

Thanks alot on the info AMS

and the point of the thread...

Will these high flow cats increase the exhaust sound on a good note?

I guess on a 55 NA AMG it's 3" inlet/outlet

Hello Tony,

Yes they increase flow as well as improve exhaust note. The stock OD of the AMG piping is 2.35" roughly so 2.5" is the best size for your application.

Hope that helps,
~AMS~

[AMS Performance]

Originally Posted by MARTYMAR

I've heard nothing back from AMS contact regarding the 300 cell cats. What's up with that? I emailed Magnaflow yesterday and haven't heard anything. I could just buy them for $195 and forget about the small savings but I figured I'll give it a try since I seldom buy parts through a sponsor recommendation like this....

Hello Marty,

I received your PM but it did not say anything other than you contacted the seller. Sometimes you have to check your ebay email and not the ebay msg system. Usually they respond with in 12-24 hours.

[GiZzO]

Originally Posted by MARTYMAR

Finally I heard back from Jim today but decided not to change the cats because they're illegal in California....aftermarket that is. I could get my car impounded if they're found on my car. With my luck I'll get caught so I decided to not do it..dam....time for another plan....

but seriously how could they tell? Just neeed to find someone thats willing to install.

Can we do a X pipe or H pipe on our cars? I haven't inspected the piping if the pipes are Y joined after the primary cats or 2 tubes.

I think im sold on = AMS shorty headers -> AMG primary cats - > AMG resonator -> 300 cell metal cat -> Eisennman Race muffler (all new piping if needed, correct any restrictive bends)

[lychyrychy]

Originally Posted by M-bENZ

LOL aite...Anyway I'm leaving on 26 I'll pm you when I get there and Klinh too he told me he lived somewhere around there too...cant wait to see you guys .

Andy

What state are you coming from Andy? I'm from Socal too

[M-bENZ]

Originally Posted by lychyrychy

What state are you coming from Andy? I'm from Socal too

oh man im too far away from you guys (1300 miles) but hey if you can come to Anaheim to meet with us thats great...so yea just let me know. I will pm all you guys when I get there (June 26).

Andy

[AMS Performance]

Originally Posted by GiZzO

but seriously how could they tell? Just neeed to find someone thats willing to install.

Can we do a X pipe or H pipe on our cars? I haven't inspected the piping if the pipes are Y joined after the primary cats or 2 tubes.

I think im sold on = AMS shorty headers -> AMG primary cats - > AMG resonator -> 300 cell metal cat -> Eisennman Race muffler (all new piping if needed, correct any restrictive bends)

Hello Gizzo,

There is no point in doing X-pipe or H-pipe on the W208s since they are already a Y-pipe design (which is great for torque).

The setup you mentioned is a great design, although I would hold off on the Eisennman until last because the car does get significantly louder with Headers & high flow secondaries. In fact, every one of our customers who has gotten Header & 2nd cats combo eventually decided not to do aftermarket catback afterall. The general concensus seems to be just do headers & cats and leave the rest alone. After all the whole front section of the exhaust system is NOT AMG, its mercedes benz (manifolds, primary & secondary cats). Only the rear section is AMG, and they did a great job designing it. It is the front section that needs all the attention. (picture below for reference)

The AMG stock rear section (resonator & muffler) really is the perfect design for our cars so I would recommend waiting on the rear muffler until after the car has been driven on headers & cats for 1-2 months and the exhaust note has settled, then finally make your decision on catback. I have a feeling you won't get the rear muffler after all which will save you a substantial amount of money to spend elsewhere.

hope that helps,
~AMS~

(the top front section #5 #6, and middle rear section are the W208 AMG setup #13 #14)

[GiZzO]

Originally Posted by AMS Performance

Hello Gizzo,

There is no point in doing X-pipe or H-pipe on the W208s since they are already a Y-pipe design (which is great for torque).

The setup you mentioned is a great design, although I would hold off on the Eisennman until last because the car does get significantly louder with Headers & high flow secondaries. In fact, every one of our customers who has gotten Header & 2nd cats combo eventually decided not to do aftermarket catback afterall. The general concensus seems to be just do headers & cats and leave the rest alone. After all the whole front section of the exhaust system is NOT AMG, its mercedes benz (manifolds, primary & secondary cats). Only the rear section is AMG, and they did a great job designing it. It is the front section that needs all the attention. (picture below for reference)

The AMG stock rear section (resonator & muffler) really is the perfect design for our cars so I would recommend waiting on the rear muffler until after the car has been driven on headers & cats for 1-2 months and the exhaust note has settled, then finally make your decision on catback. I have a feeling you won't get the rear muffler after all which will save you a substantial amount of money to spend elsewhere.

hope that helps,
~AMS~

(the top front section #5 #6, and middle rear section are the W208 AMG setup #13 #14)

awesome thx for that copy of exhaust diagram, all is clear now.
I'll go with your suggestion without the muffler initially, since that muffler is pricey. The tone the Eisennman gives from all the videos i viewed it sounds hard to pass. Headers + Cats would make it sound even better.

I just need to decide if i wanna go 300 cell or 200. I need to understand this raspyness you speak of :p

[AMS Performance]

Originally Posted by GiZzO

awesome thx for that copy of exhaust diagram, all is clear now.
I'll go with your suggestion without the muffler initially, since that muffler is pricey. The tone the Eisennman gives from all the videos i viewed it sounds hard to pass. Headers + Cats would make it sound even better.

I just need to decide if i wanna go 300 cell or 200. I need to understand this raspyness you speak of :p

The 300-cell metal cores are $180 shipped for the pair 200s are closer to 220+, so the 300s are cheaper, and do a better job of cleaning up the exhaust without sacrificing much power (if any). They do clean up the sound considerably as well to give a nice clean sound. The difference between 200-300 isn't huge but it is enough to be noticed. Personally, I prefer 300-cells just b/c all around is a better option.

The rear section of the exhaust is 100% free flowing as is and you won't pick up any HP really so its hard to justify that much $$ purely for sound purposes, might as well tackle the real bottlenecks in the system, pick up more power, and improve sound all at the same time for a fraction of the cost per HP.

Hope that helps,
~AMS~

[FatTony001]

thanks AMS for the great info !

One more question:

What's all this Primary cat / Secondary cat all about ?

I've read on the E55, it's best to change the Primary...

is it the same with our AMG NA engine?


And if I change my 2nd cat, is there an O2 sensor or
something in there

[AMS Performance]

Originally Posted by FatTony001

thanks AMS for the great info !

One more question:

What's all this Primary cat / Secondary cat all about ?

I've read on the E55, it's best to change the Primary...

is it the same with our AMG NA engine?


And if I change my 2nd cat, is there an O2 sensor or
something in there

Your car has 4 cats, two primaries / two secondaries (one per side each).

The primaries have O2 sensors before & after. The secondaries are much further back in the exhaust system (look at picture provided above).

No, its not "best" to change primaries. Changing primaries is a huge headache b/c you have to worry about check engine lights and etc. also the primary cats are actually less restrictive than the secondary cats. Hope that helps. Get the 300-cell secondary cats, they won't disappoint

~AMS~