Renault have been very quick introducing new bits on its R29 contender, and part of their rear end update at China was a heavily revised sidepod ending. In sharp contrast with version seen at the launch, the new sidepods have more openings to provide extra cooling. As such the team could slim down the bodywork quite a bit and ditch its undercut hot air channel between the rear wheels.
A disadvantage of allowing more hot air to escape earlier on in the air stream, the sidepod components are exposed to much more heat. After initial running at Bahrain today, the team decided to fit additional titanium plates close to the exhaust to prevent the bodywork from burning.