SLK55 (R171) 2004 - 2010: SLK200K, SLK280, SLK350, SLK55, SLK55 Black Series

200-cell metallic cats install by AAA Performance Exhaust

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old Apr 26, 2009 | 01:30 PM
  #26  
lsufan's Avatar
Member
 
Joined: Jun 2008
Posts: 126
Likes: 0
2006 SLK55
No one that I know of w/o ECU programming. I was tempted to do the same, but after speaking the RennTech, Brabus and Kleeman, I decided against it while under warranty. I would imagine a 300 metallic substrate of good quality would be more efficient in burning carbon the stock primaries. That being said, as post 02 sensors do play a role in fuel adaptation, I didn't want to risk it w/o a full dyno run to be sure A/F are all ok.
Reply
Old Apr 27, 2009 | 01:25 PM
  #27  
AMS Performance's Avatar
Former Vendor of MBWorld
 
Joined: Sep 2008
Posts: 1,935
Likes: 5
AMG
You can easily get away with it on 300 cell high flow metal core cats. On some cars you can easily get away with even 200-cell primaries and no CEL light. The primary O2s are the ones that do most of the work, the secondaries are just there to check to see if the cats are actually doing anything (of if they even exist). Start of by installing high flow 2nd cats and then later on if you want to do primaries. However keep in mind, the stock primary cats are metal core, the secondary cats are ceramic (and these fail frequently and are much larger and more restrictive overall), so replace the secondaries for more power & better sound and you should be happy.
Reply
Old May 2, 2009 | 10:23 AM
  #28  
imducati's Avatar
Member
 
Joined: Jul 2005
Posts: 116
Likes: 0
From: SF bay area
slk55 2005; e320 2004 sport
thanks for the great responses, I'll let you know how it goes.
Reply
Old May 4, 2009 | 11:47 PM
  #29  
A' La F1's Avatar
Thread Starter
Member
 
Joined: Mar 2007
Posts: 194
Likes: 2
From: Redondo Beach, CA
2006 SLK 55 amg, 2002 CLK 430 Cab (hers), 1989 944 Turbo (sold), CLK 500 (sold), 125cc shifter kart
Folks have been wondering where I got the cats on ebay. I bought them from this company, but I cannot find them on ebay for some reason. Do a search for ebay seller "ppe" - it may work. I paid $200 plus shipping - they will give you a discount for buying two.

http://www.ppeengineering.com/fabparts.htm
Reply
Old May 11, 2009 | 01:13 PM
  #30  
JRHolt's Avatar
Super Member
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Mar 2009
Posts: 561
Likes: 72
From: Las Colinas (Irving, Texas)
2024 GLE 63 S AMG SUV
I think that this is the eBay link: Peren Performance Exhaust Supply
Reply
Old May 13, 2009 | 02:43 AM
  #31  
linh811's Avatar
Junior Member
 
Joined: Mar 2007
Posts: 15
Likes: 0
wow you went through a lot of work. I just went the cheap route: 2nd cat delete, xpipe, muffler delete. I had them cut the pipes immediately after the 02 sensors to get ride of that squished, crimped, 90 bend right before the stock 2nd cats. Love the sound of my car.

took delivery of my car just 3 days ago (83 miles on the odo), probably wait a few months before i try replacing the primary cats with 300cell racing cats.
Reply

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


You have already rated this thread Rating: Thread Rating: 1 votes, 5.00 average.


All times are GMT -4. The time now is 01:43 PM.

story-0
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

Slideshow: Not every Mercedes design becomes timeless, some feel stuck in the era they came from.

By Verdad Gallardo | 2026-05-12 18:09:07


VIEW MORE
story-1
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

Slideshow: Yes, Mercedes built manual cars, and some of them are far more interesting than you'd expect.

By Verdad Gallardo | 2026-05-02 12:36:58


VIEW MORE
story-2
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.

By Verdad Gallardo | 2026-04-29 11:19:28


VIEW MORE
story-3
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

Slideshow: Before curves took over, Mercedes mastered the art of the straight line, and some of those shapes still look right today.

By Verdad Gallardo | 2026-04-25 12:05:49


VIEW MORE
story-4
Flawlessly Restored Mercedes 190E Evo II Heads to Auction

Slideshow: The 190E Evolution II shows how a homologation necessity became a six-figure collector icon.

By Verdad Gallardo | 2026-04-22 17:53:47


VIEW MORE
story-5
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

Slideshow: Mercedes is turning one of its core nameplates electric, and the details show just how serious this shift is.

By Verdad Gallardo | 2026-04-21 13:58:06


VIEW MORE
story-6
Mercedes EQS Gets A Major Update: Everything You Need to Know

Slideshow: Faster charging, longer range, and a controversial steer-by-wire system define the latest evolution of Mercedes-Benz EQS.

By Verdad Gallardo | 2026-04-15 10:35:34


VIEW MORE
story-7
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

Slideshow: These overlooked Mercedes-Benz models never got the spotlight, but they quietly delivered more than most remember.

By Verdad Gallardo | 2026-04-13 19:35:45


VIEW MORE
story-8
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

Slideshow: A well-used 1991 Mercedes-Benz 300D with more than one million miles is now looking for a new owner, and it still appears ready for more.

By Verdad Gallardo | 2026-04-10 10:05:15


VIEW MORE
story-9
10 Most Reliable Mercedes-Benz Models You Can Buy Used

Slideshow: From bulletproof sedans to surprisingly tough SUVs, these Mercedes models proved that the three-pointed star can go the distance.

By Verdad Gallardo | 2026-04-08 09:55:49


VIEW MORE