If only RemFlex was SlimFlex

I ran a Remflex on my Slanty. They are the only exhaust gaskets I use anymore. Have you tried starting the nuts without the conical washers to beging the crushing of the gasket to allow room for the rest of the hardware to be installed? Once you install the proper hardware, be careful to not over torque the manifolds.

Slant's intake and exhaust manifolds expand and contract on the head slightly. It is important to use all the correct hardware and properly torque them, so they can move freely when heated and cooled. The graphite construction of the Remflex is ideal for allowing this expansion and contraction to take place. I also use a dab of synthetic disc brake grease on the washers to keep them from binding during the heating and cooling cycles.