Ready to pull trigger on mods. Renntech?
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Newbie
Joined: Sep 2022
Posts: 7
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From: KCMO
AMG C63 S
Ready to pull trigger on mods. Renntech?
So I'm ready for exhaust/tune to get the ball rolling. Looking at Renntech's R1 kit for my 2021 C63s. I like that it is a hand held tune and I can easily revert back to stock if needed. Are there any downsides to this kit or are there better options out there? I'm in the Kansas City area so finding a shop that has experience with these cars might be a challenge.
Member
Joined: Feb 2022
Posts: 120
Likes: 35
C63s
One of the pros are like you mentioned. You can revert back to stock and if ever the dealer flashes your ECU, you can revert back to the tune without paying again. The process is very easy and takes 2 mins. They also been in the game a long time and are the official tuner for mercedes so you know they won't be crazy over the top tuning to the max achievable in order to ruin your reliability in the mean time.... But the downside to that is that I felt the tune is quite mild. I did runs under same conditions testing the tune first and then the stock program to prevent heat soak and on a different day, the stock program first then the tune and in general my 60 to 130 times improved by 0.2 secs on an otherwise stock car (only secondary Cats removed). I was expecting more. When I connected an obdII reader I noted the max turbo pressure increased by about 3psi, so it's doing something. But maybe not enough without other mods.
Last edited by mars c63s; Mar 19, 2024 at 05:20 AM.
