i was wondering if i need to torque the bolts when i put the plenum on

 

All bolts should be torqued to their specification, specially in the plenum , you want equal pressure for a uniform fit to minimize leaks , for that size bolt and if you do not have the specific value from the repair manual , use the general chart, 8 to 10 foot pound of torque for that bolt size , unless some one knows the specific value and can enlighten us .
I would not go any tighter than that.

 

Quote from the shop manual...

4.9 - 6.9 N-m (0.5 - 0.7 kg-m, 44 - 61 in-lbs)

That works out to 3.67 - 5.08 ft-lbs

Be careful, I'd recommend not exceeding 5 ft-lbs. Twisted off cap screws are had to get out. The shop manual provides a percise order which essentually starts at the center, moving back and forth and working out towards each fender.

 

Thanks for the correction Dave, I forgot it is an aluminum component.
And We do not want to strip any threads.