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Kleemann or Renntech ECU upgrade?

3K views 0 replies 1 participant last post by  princemarko 
#1 · (Edited)
Getting some Brabus work done on my G55 soon(B55 performance kit)...

My question is should I get the Renntech or the Kleemann ECU upgrade?

Kleemann claims more power, but I like the fact that Renntech advertises the +2 mpg with a conservative HP gain, especially on the G55's MPG on the highway.

I would like to take the G55 to the DuPont Registry's car show here in Tampa, and I wouldn't want to embarrass myself ;)
 
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