Not sure what the amp draw on my mamba 6900 is, but my maxamps 6000 20c 2s has held up remarkably thus far. Also, I saw no performance loss trying out my true-rc 8000 10c pack. I think they make a 15c version as well, but I doubt you'll get it to fit right in your car. Very well priced packs. My 8000 10c was under 90 bucks shipped.