When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
You can fit big brakes on the 964 although the 993 application won't work on the 964. I have an older style aluminum hat I use with 993 RS rear calipers but it required me to loose my handbrake. It appears the brembo setup is your only option.