With the CSF radiator being bulkier I found it was rubbing against my lower cold side charge pipe coming off the FMIC. Eventually this kept causing my CP to blow off at the TB (was weird as never had CP blow off since install in 2012)
Here are some pics of a mates car who had similar issues (I also had same symptoms with rubbing A/C lines, need to install the LCI lines with added clearance..)
https://www.1addicts.com/forums/show...&postcount=221
https://www.1addicts.com/forums/show...&postcount=224