Filling both roll restrictors may cause heavy NVH and will probobly not gain very much more torque at the wheels over the front filled mount and a new stock mount ( or you can use roof and flashing poly for the rear restrictor). This will keep it tight, but cut down on unnecessary NVH at the same time! If you think about it, this is probobly why Energy Suspensions still hasn't manufactured a rear mount insert! Usatisfactory NVH to torque transfer ratios.
