You need the install kit as well, see below for the Mopar performance part numbers.
When you go to install the M1 intake don't use cork end gaskets, use the rubber/metal ones. Mopar or the Felpro kit has them.
P5007852 M1 intake, 2 bbl mpi, aluminum, single plane, magnum direct replacement, without EGR 1997-02 5.2/5.9 same height as stock manifold.
P5007638 Magnum intake manifold installation kit $69.95
Intake gasket set.
P4876049 Intake Manifold Gasket Set (5.9L Truck Magnum/Jeep Engines) $33.25
Cheap way to get the new intake bolts.
P4876772 Intake Manifold Attaching Bolts (5.2L/5.9L Truck Magnum/Jeep Engine $7.75 for all of them.
I like to install new lifters while I am in there not to expensive
P5249862 Magnum hydraulic roller tappets-set of 16 $117.50