Originally Posted by 1REDCAV
I'd recommend doing the upper intake, as well, so you won't have to do it later on down the road...how many miles are on your Malibu?
Are you sure he has a nylon upper intake?
I searched RockAuto and can only find the gasket, so I searched Nalley Buick Parts, and I found a pic of the plenum, it looks aluminum to me, attaching a pic of it.
He'll have to have the upper intake removed to get to the lower, and the LIM Kit comes with the plenum gasket, so I think he'll be ok as long as they put the new plenum gasket on.
Unless I am wrong, and his is in fact nylon/plastic.