SL55/63/65/R230 AMG: RennTech or Kleemanns Headers ?
First of all; I need cats – In this country you have to go for control each year and the cats are a necessity but I would dare a pair of sports cats – 200 no less.
I have been told that if I chose Kleemans headers, then I will have to combined them with sport cats but if I take RennTech headers, then I can keep my original cats - these two set-up will give the same output in power …….. but why?

RennTech headers are a direct bolt-on to my original cats but the Kleeman’s requires cut + welding.
Which to choose?
First of all; I need cats – In this country you have to go for control each year and the cats are a necessity but I would dare a pair of sports cats – 200 no less.
I have been told that if I chose Kleemans headers, then I will have to combined them with sport cats but if I take RennTech headers, then I can keep my original cats - these two set-up will give the same output in power …….. but why?

RennTech headers are a direct bolt-on to my original cats but the Kleeman’s requires cut + welding.
Which to choose?
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http://dyno-comp.com/details.php?bro...del=68&type=80
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Quote:
Originally Posted by kustom2k1
You should just put new gaskets in all around. Which headers are you going to use?
Gaskets… yeahh – will check STAR tomorrow … maybe at the same time go for a torque converter updated?
Headers …. yes …. been thinking of Kleemans + sports cats but that will mean cutting and welding - not that the job is the problem but …… you see – if my car can’t go through the control (every year) then I’m left with a car I cant drive ;(( and a lot of work … again …… so when thinking a little ahead then I think the smarts will probably be to go for Rentech … they should go direct on my original cats …. and Eurocharge tell me the gain in power will be the same as Kleemans ??????? [IMG]file:///C:\Users\Klaus\AppData\Local\Temp\msohtmlclip1\06\ clip_image002.gif[/IMG]
https://mbworld.org/forums/sl55-amg-...ld-thread.html
before i found the literal steal on my lth's, i was looking at kleemann pretty hard. would love the mbh (which luckily mine are atleast comparable now) but at the same price of new wheels, twice the cost of a lower pulley and tune and all the other stuff, it was just hard to justify till it was potentially just the last thing once you had everything else.
not sure if you eliminated the kleemann downpipes, you would have room for a cat in that area?








