987 Righthand curve at high speed-what’s this shuddering
 

Hi. I’m new to this forum and learned from some of the posts here that 986 and 986 models have possibly linked left or right turns shaking to engine mount issues. It’s not possible for me to know what is the source of shuddering, though It occurs after fr t suspension work done; including new Porsche rotors and pads and original equipment shocks and related items. Still, the front is shuddering now after quite a bit of work on upkeeping this 2008 Boxster S RS60.

Are there any suggestions for my mechanic to consider to fix this shuddering at 50 plus mph during downhill and uphill right hand cornering? Thanks