C43 Cat Delete/ AMG exhaust

tonysemi · 10-27-2009, 09:21 PM

So... I want better sound (a lil louder) out of my c43.. A few people have told me to remove the cats?Is this a bad idea? and if not how is the best way to accomplish this? Thanks

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PaulRicciardi · 10-27-2009, 10:12 PM

Quote:

Originally Posted by tonysemi

So... I want better sound (a lil louder) out of my c43.. A few people have told me to remove the cats?Is this a bad idea? and if not how is the best way to accomplish this? Thanks

I don't remember if the C43 has both primary and secondary cats, or if it is just one cat. If you pull out all of the cats it will make the car louder and probably free up some horsepower. However if your state has smog/emissions testing, your car will fail.

For that reason it'd be a better idea to go to high flow steel cats. This will make the car mildly louder and still free up some horses while not being overly loud. This will also allow you to still pass smog tests. You may want to look into deleting the resonator and going to straight pipe. Again, this will give a richer sound, more volume, and more power.

Personally I would go with high flow cats, a resonator delete, and a higher flow muffler. I think either Kleemann or Eisenmann makes a muffler for your car, the resonator delete can be done by a good exhaust shop, and if you order a high flow cat, you can have it put in at the shop as well.

Hope that helped some.

tonysemi · 10-27-2009, 10:20 PM

That is invaluable info, thanks! just what i wanted to know

silence · 10-29-2009, 01:58 AM

performance wise you aren't going to gain anything

delete the resonator for the sound- keep the stock muffler and your "sleeper" status. Nothing cooler than the way our cars go from sounding like 'nothing' to exotic V8 when you get on it (well, other than when they go from slight rumble to exotic v8 plus supercharger scream).

"full" exhaust as described above will cost you 1/4 or so of the total I have into performance stuff... and net 3 hp at the expense of tq? doesn't seem worth it to me.

AMS Performance · 10-29-2009, 05:45 AM

The only mods that will give you decent power are Headers & high flow 2nd cats. They will also significantly improve sound as well. Don't touch the rear muffler or resonator, those aren't the weak points in the system, its the front half of the system you should spend all your time on.

tonysemi · 10-29-2009, 10:39 AM

Thanks! I dont want to hack my car up for 3 hp, or to loose tq. Thanks fot the info!!!! Suspension wise? any suggestions?

silence · 10-29-2009, 12:38 PM

speedybenz has all the suspension stuff you could want- do a search

my honest opinion- car handles pretty well with springs/shocks, isn't going to handle great either way and isn't a car that I'd personally take to a track with turns.... so, springs/shocks it is.

There are guys who have really put a lot of effort into it and who DO track their C43s (55s) with great success, but don't do the suspension stuff just to do it.

tonysemi · 10-29-2009, 07:01 PM

Quote:

Originally Posted by silence

speedybenz has all the suspension stuff you could want- do a search

my honest opinion- car handles pretty well with springs/shocks, isn't going to handle great either way and isn't a car that I'd personally take to a track with turns.... so, springs/shocks it is.

There are guys who have really put a lot of effort into it and who DO track their C43s (55s) with great success, but don't do the suspension stuff just to do it.

Ok,

I got H&R springs, any suggestions on shocks? Kyb AGX, Koni, Bilstien or other? I usually go with kyb on my other cars with great success, but Iam wondering about new adjustable Bilstiens...

AMGC · 10-30-2009, 02:30 AM

KYBs suck. Bllly sports are only shocks ill use. My other 16V came with Koni adjustable and im not impressed with them.

tonysemi · 10-30-2009, 02:46 AM

Quote:

Originally Posted by AMGC

KYBs suck. Bllly sports are only shocks ill use. My other 16V came with Koni adjustable and im not impressed with them.

Billy shocks? I am not familiar. do you have a website? And thx agin for your input.

PaulRicciardi · 10-30-2009, 11:16 AM

Quote:

Originally Posted by tonysemi

Billy shocks? I am not familiar. do you have a website? And thx agin for your input.

Billy=Bilstein

speedybenz · 10-30-2009, 07:36 PM

Silence,

With the right suspension and sway-bars your C43 would behave completly different and will get around corners better than a Stock BMW M3 and better than one with minor mods. Or I guess I will say mine will, but then like you mentioned I have spent many hours working it all out.

But if you don't lower the car too far and use some extra bump rubbers on the shocks you can get pretty close and the car is still very livable for everyday use.

Best Shocks - Penske Triple adjustable shock with remote canisters that hold both low speed and high speed compression adjusters. The rebound is adjusted with a knob at the bottom of the shock body.

Jeff

silence · 10-30-2009, 11:41 PM

yeah, I'm not knocking it- just doesn't fit my (or what I assume the OPs usage) of the car

speedybenz · 10-31-2009, 04:03 AM

Silence,

Ya, I totally understand that. But for me that is one of the reasons I like it so much. Nobody expects these cars to be able to run around the track or up in the hillls like they do and so it puts a smile on my face when I can knock the socks off some new 350Z driver who is unaware of what he just came into contact with.

The look on their faces is priceless.

Sorry for the detour on this thread.

Jeff

ProjectC55 · 11-01-2009, 12:34 AM

Quote:

Originally Posted by speedybenz

Silence,

Ya, I totally understand that. But for me that is one of the reasons I like it so much. Nobody expects these cars to be able to run around the track or up in the hillls like they do and so it puts a smile on my face when I can knock the socks off some new 350Z driver who is unaware of what he just came into contact with.

The look on their faces is priceless.

Sorry for the detour on this thread.

Jeff

Jeff I want a pr of those Penske shocks for the fromt of my car. care to pm me a price? Thanx!

tonysemi · 11-01-2009, 11:33 AM

Speedy Benz,
I am interested in the penske's also, can we get a group buy together or something?Im sure others are interested. If not , a website to purchase them from. Also " Brakeman" brakes? I need new pads for my rears and possible slotted rotors, are these to your liking? It seems like we have the same ideas or goals for our cars. And your setup sounds like what I want, but with the brand namesive been lacking. (Newbie)

I know its a beast, but I want reflex's of a cat ! LOL,THANKS

PJmak · 11-01-2009, 01:53 PM

just with H&R springs and bilstein shocks, my car transformed completly

I love driving it in canyons and my friend who tracks his 911 turbo always tells me my car handles awesome

Btw I just deleted my resonator only and the sound is perfect. Not too loud but noticeably louder than stock. It suits the car perfectly. I paid $70 at a local muffler shop and im completely satisfied

Speedybenz we have to get together sometimes since you are in sacramento. I might go to laguna with my friend in December, you should join

speedybenz · 11-01-2009, 02:16 PM

I will get you guys pricing on the Penske shocks. The Delrin sway bar bushings and better or I shold say longer shock bump rubbers.

Give me a couple of days to get pricing together and I will see if Penske will offer any kind of group buy on these.

Jeff

tonysemi · 11-01-2009, 08:15 PM

Thanks Jeff!! I appreciate your help and knowledge

PJmak · 11-02-2009, 04:17 PM

heres a clip of mine

I only did resonator delete

http://www.youtube.com/watch?v=wI-9SpJzVr8

speedybenz · 11-02-2009, 06:57 PM

Speedybenz On Board

that is a link to pics of the shocks and some other stuff

Jeff

C43AMG · 11-02-2009, 10:25 PM

Quote:

Originally Posted by speedybenz

I will get you guys pricing on the Penske shocks. The Delrin sway bar bushings and better or I shold say longer shock bump rubbers.

Give me a couple of days to get pricing together and I will see if Penske will offer any kind of group buy on these.

Jeff

Jeff , keep me in the loop about this "group buy" .

tonysemi · 11-02-2009, 10:34 PM

Speedy Benz, pictures are impressive!

tonysemi · 11-03-2009, 08:44 AM

Nice video PJmak, very CLEAN

Great sound, and you just deleted the resonator?

10-29-2009, 01:58 AM	#4
silence Super Member Join Date: Dec 2007 Location: Rochester, MN Posts: 940 Drives: sounds like airplane	performance wise you aren't going to gain anything delete the resonator for the sound- keep the stock muffler and your "sleeper" status. Nothing cooler than the way our cars go from sounding like 'nothing' to exotic V8 when you get on it (well, other than when they go from slight rumble to exotic v8 plus supercharger scream). "full" exhaust as described above will cost you 1/4 or so of the total I have into performance stuff... and net 3 hp at the expense of tq? doesn't seem worth it to me. __________________ C43 w. boost and many custom modifications (actually custom) G35x and Tahoe for daily use- but I don't drive much... Specialized s-works, salsa mamasita, jamis komodo, redline monocog 29er

10-29-2009, 05:45 AM	#5
AMS Performance SPONSOR Join Date: Sep 2008 Posts: 1,313 Drives: AMG	The only mods that will give you decent power are Headers & high flow 2nd cats. They will also significantly improve sound as well. Don't touch the rear muffler or resonator, those aren't the weak points in the system, its the front half of the system you should spend all your time on. __________________ << E55, C55, CLK55, CL55, SL55, SLK 55, S55 Headers >> << New W202 C43 AMG Stage 2 Performance Package !! >> << New 230, 280, 350 & 550 Pulleys for M272 & M273!! >> << Gen2 C36 / C280 / E320 M104 OEM+ Pulley Design! (under $300) >> (contact via email for more details) << M119 Performance OEM+ Dampers now available! >> <<< AMS WEBSITE >>> (New Products)

10-29-2009, 12:38 PM	#7
silence Super Member Join Date: Dec 2007 Location: Rochester, MN Posts: 940 Drives: sounds like airplane	speedybenz has all the suspension stuff you could want- do a search my honest opinion- car handles pretty well with springs/shocks, isn't going to handle great either way and isn't a car that I'd personally take to a track with turns.... so, springs/shocks it is. There are guys who have really put a lot of effort into it and who DO track their C43s (55s) with great success, but don't do the suspension stuff just to do it. __________________ C43 w. boost and many custom modifications (actually custom) G35x and Tahoe for daily use- but I don't drive much... Specialized s-works, salsa mamasita, jamis komodo, redline monocog 29er

10-30-2009, 02:30 AM	#9
AMGC Senior Member Join Date: May 2008 Location: MA Posts: 337 Drives: C36, Turbo'd 87 190E 2.3-16 Cosworth, SC'd 86 190E 2.3-16 Cosworth	KYBs suck. Bllly sports are only shocks ill use. My other 16V came with Koni adjustable and im not impressed with them. __________________ 1996 C36-parting 1986 2.3-16 Cosworth 5 speed- rear ended to death by texting teen speeding=law$uit 1987 190E 2.3-16 Cosworth- Mint Getrag 5 speed, leather sportline wheel, Slammed on AMG Monos, Momo goodies, 300TE front sway, Evo 2 rear sway, custom 90A Poly Race bushings, C36 AMG Calipers, EFI, Mosselman headers, Garrett turbo... 1987 190E 2.3-16- getrag, lowered, BBS RS's, goodies, Eaton SC on Mosselman piggyback ECU 190 WHORE

10-30-2009, 07:36 PM	#12
speedybenz Super Member Join Date: Apr 2002 Location: Sacramento Posts: 506 Drives: AMG C43, 1999	Silence, With the right suspension and sway-bars your C43 would behave completly different and will get around corners better than a Stock BMW M3 and better than one with minor mods. Or I guess I will say mine will, but then like you mentioned I have spent many hours working it all out. But if you don't lower the car too far and use some extra bump rubbers on the shocks you can get pretty close and the car is still very livable for everyday use. Best Shocks - Penske Triple adjustable shock with remote canisters that hold both low speed and high speed compression adjusters. The rebound is adjusted with a knob at the bottom of the shock body. Jeff __________________ 1999, AMG C43 w/5.5L Engine, Obsidian Black, Penske Shocks, Adjustable Spring Perches w/Eibach 2.5" race Springs, Custom 32mm Frt & 22 mm Rear Roll Bar, SSR Comps 17x9.5 frt & 17x9.5 rear, Adj. Rear Camber Arms, LSDiff, Headers, hi-flow cats, Brakeman Brakes, other stuff.

10-27-2009, 10:20 PM	#3
tonysemi Member Join Date: Oct 2009 Location: Newport News Posts: 91 Drives: 1998 C43 AMG, 95 Acura GSR , 97 Civic Hatch	That is invaluable info, thanks! just what i wanted to know

10-29-2009, 10:39 AM	#6
tonysemi Member Join Date: Oct 2009 Location: Newport News Posts: 91 Drives: 1998 C43 AMG, 95 Acura GSR , 97 Civic Hatch	Thanks! I dont want to hack my car up for 3 hp, or to loose tq. Thanks fot the info!!!! Suspension wise? any suggestions?

10-30-2009, 11:41 PM	#13
silence Super Member Join Date: Dec 2007 Location: Rochester, MN Posts: 940 Drives: sounds like airplane	yeah, I'm not knocking it- just doesn't fit my (or what I assume the OPs usage) of the car __________________ C43 w. boost and many custom modifications (actually custom) G35x and Tahoe for daily use- but I don't drive much... Specialized s-works, salsa mamasita, jamis komodo, redline monocog 29er

10-31-2009, 04:03 AM	#14
speedybenz Super Member Join Date: Apr 2002 Location: Sacramento Posts: 506 Drives: AMG C43, 1999	Silence, Ya, I totally understand that. But for me that is one of the reasons I like it so much. Nobody expects these cars to be able to run around the track or up in the hillls like they do and so it puts a smile on my face when I can knock the socks off some new 350Z driver who is unaware of what he just came into contact with. The look on their faces is priceless. Sorry for the detour on this thread. Jeff __________________ 1999, AMG C43 w/5.5L Engine, Obsidian Black, Penske Shocks, Adjustable Spring Perches w/Eibach 2.5" race Springs, Custom 32mm Frt & 22 mm Rear Roll Bar, SSR Comps 17x9.5 frt & 17x9.5 rear, Adj. Rear Camber Arms, LSDiff, Headers, hi-flow cats, Brakeman Brakes, other stuff.

11-01-2009, 11:33 AM	#16
tonysemi Member Join Date: Oct 2009 Location: Newport News Posts: 91 Drives: 1998 C43 AMG, 95 Acura GSR , 97 Civic Hatch	Speedy Benz, I am interested in the penske's also, can we get a group buy together or something?Im sure others are interested. If not , a website to purchase them from. Also " Brakeman" brakes? I need new pads for my rears and possible slotted rotors, are these to your liking? It seems like we have the same ideas or goals for our cars. And your setup sounds like what I want, but with the brand namesive been lacking. (Newbie) I know its a beast, but I want reflex's of a cat ! LOL,THANKS

11-01-2009, 01:53 PM	#17
PJmak Senior Member Join Date: Sep 2007 Posts: 486 Drives: 98 C43 obs. black\2 tone int	just with H&R springs and bilstein shocks, my car transformed completly I love driving it in canyons and my friend who tracks his 911 turbo always tells me my car handles awesome Btw I just deleted my resonator only and the sound is perfect. Not too loud but noticeably louder than stock. It suits the car perfectly. I paid $70 at a local muffler shop and im completely satisfied Speedybenz we have to get together sometimes since you are in sacramento. I might go to laguna with my friend in December, you should join __________________

11-01-2009, 02:16 PM	#18
speedybenz Super Member Join Date: Apr 2002 Location: Sacramento Posts: 506 Drives: AMG C43, 1999	I will get you guys pricing on the Penske shocks. The Delrin sway bar bushings and better or I shold say longer shock bump rubbers. Give me a couple of days to get pricing together and I will see if Penske will offer any kind of group buy on these. Jeff __________________ 1999, AMG C43 w/5.5L Engine, Obsidian Black, Penske Shocks, Adjustable Spring Perches w/Eibach 2.5" race Springs, Custom 32mm Frt & 22 mm Rear Roll Bar, SSR Comps 17x9.5 frt & 17x9.5 rear, Adj. Rear Camber Arms, LSDiff, Headers, hi-flow cats, Brakeman Brakes, other stuff.

11-01-2009, 08:15 PM	#19
tonysemi Member Join Date: Oct 2009 Location: Newport News Posts: 91 Drives: 1998 C43 AMG, 95 Acura GSR , 97 Civic Hatch	Thanks Jeff!! I appreciate your help and knowledge

11-02-2009, 04:17 PM	#20
PJmak Senior Member Join Date: Sep 2007 Posts: 486 Drives: 98 C43 obs. black\2 tone int	heres a clip of mine I only did resonator delete http://www.youtube.com/watch?v=wI-9SpJzVr8 __________________

11-02-2009, 06:57 PM	#21
speedybenz Super Member Join Date: Apr 2002 Location: Sacramento Posts: 506 Drives: AMG C43, 1999	Speedybenz On Board that is a link to pics of the shocks and some other stuff Jeff __________________ 1999, AMG C43 w/5.5L Engine, Obsidian Black, Penske Shocks, Adjustable Spring Perches w/Eibach 2.5" race Springs, Custom 32mm Frt & 22 mm Rear Roll Bar, SSR Comps 17x9.5 frt & 17x9.5 rear, Adj. Rear Camber Arms, LSDiff, Headers, hi-flow cats, Brakeman Brakes, other stuff.

11-02-2009, 10:34 PM	#23
tonysemi Member Join Date: Oct 2009 Location: Newport News Posts: 91 Drives: 1998 C43 AMG, 95 Acura GSR , 97 Civic Hatch	Speedy Benz, pictures are impressive!

11-03-2009, 08:44 AM	#24
tonysemi Member Join Date: Oct 2009 Location: Newport News Posts: 91 Drives: 1998 C43 AMG, 95 Acura GSR , 97 Civic Hatch	Nice video PJmak, very CLEAN Great sound, and you just deleted the resonator? __________________ When a Honda just wont cut it..

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