CLS63 W219 headers and ECU tune?

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Fivehunnit

Active Member
Joined
Jun 26, 2015
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203
Car
CLS63 AMG (W219)
In the not too distant future, I'm thinking of some long tube headers and ECU tune on my CLS63, looking for the most aggressive sound and ideally the best gains. Had a look at eurocharged and MSL performance, also header manufacturers such as MBH, anyone any experience with having these mods done? What are typical gains? Thanks
 

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