which ex gasket set to get

Regarding Remflex, They won’t leak once torqued and left alone but as to being reusable I’m not so sure. I had to undo the headers to check head bolt torque after a head swap and the gaskets delaminated as I tried to carefully pull the headers away from the heads. They stuck even though I was led to believe they wouldn’t. Might take a slight loosening of the bolts then wiggle the headers to break the seal before removing IDK. YRMV