The Turner Motorsport front subframe reinforcement kit for the E46 and E85 reinforces the upper and lower tabs of the subframe where the motor mount is located. The kit requires welding. According to Turner Motorsport the kit is useful on E46s that get older and see more track-use, as they start to develop cracks and bends in places that see a lof of stress. One of the most stressful areas is the front subframe. I am not sure if the subframe reinforcement makes sense on the E85, however since the kit costs only 45 dollars and we were already working on an complete overhaul of the suspension I thought it wouldn't do much harm.
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