The torque on the LS rear main seal cover is an important factor to consider when replacing or installing a new seal. The torque for this particular part should be set between 18-25 ft/lbs. It's essential that you use a torque wrench when tightening it, so as to make sure that the tension is correct and secure. This will help ensure that the seal does not fail prematurely due to incorrect installation or inadequate tightening of the bolts. Additionally, if there are any extra gaskets used in conjunction with this part, those should also be secured using their specified torques as indicated in your owner’s manual or repair guide. Proper tightness can help prevent oil leaks and ensure longevity of performance from your vehicle's engine components!