New High Flow Cat Questions - Mercedes Benz SLK Forum

Performance MODS for the R171 Tuning and Performance modifications for your SLK

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#1 Old 06-27-2014
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New High Flow Cat Questions

Hello all, this is a great community, and this is my first post. I just got a 2009 SLK55 amg and I am looking to make some exhaust mods. I just bought the magnaflow xpipe but I figure since im getting work done I might as well address the cats. Most of the shops wont touch the second cats that I have talked to, but could I perhaps convince them if I get some high flow cats secondary? If so, any recommendation on which type? I dont want to spend an arm and a leg.

Thanks for your help!
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#2 Old 06-27-2014
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2009! just like me!

Then don’t be shy, we don’t bite. Post an introduction in the ‘New members introduce yourself here’ section, if you haven’t already. https://www.slkworld.com/new-members-...yourself-here/

owner's and maintenance manuals great R171 info:

later year owner's/maintenance/comand manuals, top right in the link below:
http://www.billsden.org/mercedes/slk/docs/#dtb


your brochure:
http://www.ragtop.org/mbbrochures/index.html


mods you should do:
smarttop
clear or tinted side markers
shorty antenna
led license plate bulbs
led parking lights
carbon fiber on the C pillars
oem windscreen or lighted/etched windscreen
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Kleemann Supercharger thread here:

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Kleemann ECU Tune, headers and downpipes thread here:

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OEM MB Plexiglass Draught Stop
Smarttop version 3.22
Previous - 02 SLK 320, 05 SLK 350
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#3 Old 06-27-2014
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I only have high-flow kleemann's on mine, and have never had a problem, but have been told that you can't pass Kali emission with 'em. No personal experience there...



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#4 Old 06-28-2014
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Thanks jbanks and UK-C200 for the information. I was looking at only doing the secondary cats (for now), and the kleeman ones are a bit pricey considering I think you can get them cheaper as long as they have the metal substrate right? The secondaries use Ceramic?
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#5 Old 06-28-2014
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also jbanks15, where can i get the thread information on most of those mods? i look all over the place google etc and theres lots of threads. which of those mods are the easier/cheapest? i want to start small. I already got the shift knob sticker from formymercedes.com and i got the kit to fix scratches on the nav screen thanks to you guys.

i still have no clue about the hi-flow cats, i want some easy hp gains and i havent been able to find anybody saying that removing the resonator and putting an xpipe in its place will generate any power.
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#6 Old 06-28-2014
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mods you should do:
smarttop

https://www.slkworld.com/general-disc...ml#post1134489

carbon fiber on the C pillars easiest and cheapest other than bulbs

https://www.slkworld.com/general-modi...cf-plunge.html

lighted/etched windscreen

http://www.kingpennindustries.com/WindR/default.aspx

led lights
http://store.ijdmtoy.com/

shorty antennas:
http://slkstore.com/collections/antenna

clear side markers and led parking lights:
http://slkstore.com/collections/lights


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#7 Old 07-06-2014
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bump, plz help
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#8 Old 07-06-2014
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I don't have an AMG, but I doubt that there are solutions out there that don't require at least one each arm & leg to acquire. Performance parts for Mercedes-Benz are usually spendy, and that goes double for AMG models. It's always been that way, in part because the performance aftermarket for M-B cars has typically been small (in numbers of cars significantly modified). Thus, the R&D cost for developing speed parts has to be amortized over far fewer projected sales than would be considered normal for a Corvette, Mustang, or WRX STi to cite but three examples.

So the AMG owners here may well come back with a solution, but it almost certainly won't be cheap.
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