More exhaust note - Page 4

AMS Performance · 10-05-2009, 05:20 PM

The initial pipe before the primary cat is ~2.0" OD (by #30). After the primary pipes its 2.35" OD pipe all the way back until it becomes a single pipe then it becomes larger at the Y-pipe. For the cats you can get 2.5" cats and slide them over the piping that should do the job just fine.

hope that helps.

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M-bENZ · 10-05-2009, 05:23 PM

Quote:

Originally Posted by AMS Performance

The initial pipe before the primary cat is ~2.0" OD (by #30). After the primary pipes its 2.35" OD pipe all the way back until it becomes a single pipe then it becomes larger at the Y-pipe. For the cats you can get 2.5" cats and slide them over the piping that should do the job just fine.

hope that helps.

Thanks for your info. that really helps

Will that throw any errors after I replaced them with the high flow cat ? just wana making sure

Tony,

not try to hijack your thread hope you dont mind....

Andy

AMS Performance · 10-05-2009, 05:26 PM

2.5" high flow 2nd cats will not throw CEL of any kind.

y420 · 10-07-2009, 01:25 AM

Quote:

Originally Posted by AMS Performance

2.5" high flow 2nd cats will not throw CEL of any kind.

what about primaries?

AMS Performance · 10-07-2009, 04:07 AM

Quote:

Originally Posted by y420

what about primaries?

As long as you use 300-cell metal core cats and you make sure the welds are strong and there are no leaks, then they should not cause a CEL. 200-cell or lower and you start getting too close to the threshold. With that said there is a decent amount of power to be picked up by the primaries as well (more so than the secondaries) which is where majority of the power comes from on medium/long tube headers that delete primary cats.

y420 · 10-07-2009, 01:55 PM

thx for the info AMS, im gonna go through with changing out both cats.. i just wanna be sure before i buy them tonight.. i have an 03, which has the single sided dual exhaust unlike the 05s which have dual sided quad exhausts.. do i have two cats while the 05s have four? or do i have four also? im a noob when it comes to MB, just got my car a couple months ago.. thanks for the knowledge

AMS Performance · 10-07-2009, 02:37 PM

Quote:

Originally Posted by y420

thx for the info AMS, im gonna go through with changing out both cats.. i just wanna be sure before i buy them tonight.. i have an 03, which has the single sided dual exhaust unlike the 05s which have dual sided quad exhausts.. do i have two cats while the 05s have four? or do i have four also? im a noob when it comes to MB, just got my car a couple months ago.. thanks for the knowledge

Is your car US spec or international?

y420 · 10-07-2009, 04:55 PM

US spec

AMS Performance · 10-07-2009, 07:33 PM

you have 4 cats

y420 · 10-07-2009, 10:48 PM

thanks man. im gonna go pick up 4 of those 300 cell metal core cats and swap those babies in there

AMS Performance · 10-08-2009, 01:33 AM

Quote:

Originally Posted by y420

thanks man. im gonna go pick up 4 of those 300 cell metal core cats and swap those babies in there

just for the record. If you have a W208, it won't fit. W209 you can probably squeeze it in ,but W208s have that very tight crossover pipe so it will be very tough.

y420 · 10-09-2009, 10:33 AM

i have a 209, but just probably? im gettin my paycheck today and was planning on ordering these cats tonight.. i wanna be 100% sure these are gonna fit..

AMS Performance · 10-09-2009, 01:38 PM

Quote:

Originally Posted by y420

i have a 209, but just probably? im gettin my paycheck today and was planning on ordering these cats tonight.. i wanna be 100% sure these are gonna fit..

Secondaries will definitely work. Primaries the exhaust shop may have to "make them work" by doing some custom fab work but again its up to the exhaust shop. If you are weary then start off with 2nd cats and do primaries later. its up to you.

hope that helps.

M-bENZ · 10-09-2009, 02:30 PM

AMS,

what happen if we replace the second cat with straight pipe ?? does that throw any CEL ?

Andy

AMS Performance · 10-09-2009, 02:36 PM

Quote:

Originally Posted by M-bENZ

AMS,

what happen if we replace the second cat with straight pipe ?? does that throw any CEL ?

Andy

No, but I would not recommend it on a V6, your car will drone like crazy. Better to go with high flows to break up a lot of that unwanted resonance & rasp.

M-bENZ · 10-09-2009, 02:42 PM

Quote:

Originally Posted by AMS Performance

No, but I would not recommend it on a V6, your car will drone like crazy. Better to go with high flows to break up a lot of that unwanted resonance & rasp.

ahaha I wont do that i was just curious. Anyway, im going to order those high flow cats soon. And should I replace the stock pipe (the one after primary) to the larger one ? and what size ? 3" pipe maybe? I guess I should have say stock pipe btwn the primary and the secondary.

Andy

njzprettyboy · 10-20-2009, 12:36 PM

Would the E500 need the same 2.5" cat if they wanted to replace the primaries (my friends cars cats are going bad)...also does someone have a link to these on ebay?

njzprettyboy · 10-29-2009, 09:43 AM

^^bump, AMS help?

AMS Performance · 10-29-2009, 10:18 AM

2.5" for secondaries, 2.25" for primaries.

Tump43 · 10-31-2009, 07:40 PM

I've now installed the RT or Magnum 300 cell highflow cats recommended by AMS in the seconday position. Sound is a little louder, not much. They seem to work just fine and the car, per the butt dyno, shows huge improvement in acceleration going from 55 to 110. I will dyno after my intake mods are finished and installed.

M-bENZ · 11-01-2009, 12:03 AM

Quote:

Originally Posted by Tump43

I've now installed the RT or Magnum 300 cell highflow cats recommended by AMS in the seconday position. Sound is a little louder, not much. They seem to work just fine and the car, per the butt dyno, shows huge improvement in acceleration going from 55 to 110. I will dyno after my intake mods are finished and installed.

Good to hear that man...im getting that Magnum 300 cell highflow cats fo sho

Andy

10-05-2009, 05:26 PM	#78
AMS Performance SPONSOR Join Date: Sep 2008 Posts: 1,313 Drives: AMG	2.5" high flow 2nd cats will not throw CEL of any kind. __________________ << 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)

10-07-2009, 07:33 PM	#84
AMS Performance SPONSOR Join Date: Sep 2008 Posts: 1,313 Drives: AMG	you have 4 cats __________________ << 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)

10-09-2009, 10:33 AM	#87
y420 Junior Member Join Date: Aug 2009 Posts: 39 Drives: CLK 55 AMG	i have a 209, but just probably? im gettin my paycheck today and was planning on ordering these cats tonight.. i wanna be 100% sure these are gonna fit.. Last edited by y420; 10-09-2009 at 10:40 AM.

10-09-2009, 02:30 PM	#89
M-bENZ MBWorld Fanatic! Join Date: Sep 2007 Posts: 3,052 Drives: 04 CLK 320 (Gone) , 01 GS 300 "Plat. Series", 05 CLK500	AMS, what happen if we replace the second cat with straight pipe ?? does that throw any CEL ? Andy __________________

10-29-2009, 10:18 AM	#94
AMS Performance SPONSOR Join Date: Sep 2008 Posts: 1,313 Drives: AMG	2.5" for secondaries, 2.25" for primaries. __________________ << 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)

10-07-2009, 01:55 PM	#81
y420 Junior Member Join Date: Aug 2009 Posts: 39 Drives: CLK 55 AMG	thx for the info AMS, im gonna go through with changing out both cats.. i just wanna be sure before i buy them tonight.. i have an 03, which has the single sided dual exhaust unlike the 05s which have dual sided quad exhausts.. do i have two cats while the 05s have four? or do i have four also? im a noob when it comes to MB, just got my car a couple months ago.. thanks for the knowledge

10-07-2009, 04:55 PM	#83
y420 Junior Member Join Date: Aug 2009 Posts: 39 Drives: CLK 55 AMG	US spec

10-07-2009, 10:48 PM	#85
y420 Junior Member Join Date: Aug 2009 Posts: 39 Drives: CLK 55 AMG	thanks man. im gonna go pick up 4 of those 300 cell metal core cats and swap those babies in there

10-20-2009, 12:36 PM	#92
njzprettyboy Member Join Date: May 2004 Location: NJ Posts: 126 Drives: 2006 CLK500	Would the E500 need the same 2.5" cat if they wanted to replace the primaries (my friends cars cats are going bad)...also does someone have a link to these on ebay?

10-29-2009, 09:43 AM	#93
njzprettyboy Member Join Date: May 2004 Location: NJ Posts: 126 Drives: 2006 CLK500	^^bump, AMS help?

10-31-2009, 07:40 PM	#95
Tump43 Senior Member Join Date: Feb 2004 Location: Westchester, NY Posts: 426 Drives: 2005 C55 AMG	I've now installed the RT or Magnum 300 cell highflow cats recommended by AMS in the seconday position. Sound is a little louder, not much. They seem to work just fine and the car, per the butt dyno, shows huge improvement in acceleration going from 55 to 110. I will dyno after my intake mods are finished and installed. __________________ Marc Quaife LSD; Kleemann LT headers; evosport UDP's; AMS crank; TVT thermo; phenolic spacers; Denso IK16's; EuroTech ECU; RennTech cf airbox; Z06 catch can; Sprintbooster; Optima RedTop; AMG: shift paddles, 030 rear calipers & rotors; Rotera brake lines; Euroteck CF lip; "C63" rear diffuser; 18"x8.5"/9.5" IForged Seneca's (summer); 18"x8" OZ Superleggera's (winter); K40 dual f&r radar w/ laser jammers; MB: digital climate control, iPod kit & mp3 CD changer; iTronic B/T for MOST.

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