Do I need gaskets or seals when I install this?

Yes — the gasket between the manifold and cylinder head is separate. Your intake manifold bolts may be reused if they're in good condition; confirm torque specs in your service manual before tightening.

Will this fit if my original manifold is cracked?

This is a direct replacement designed for the 1.6L engine. Confirm your engine displacement before ordering — wrong displacement will not bolt up.

Does this require any machine work or porting?

No. This assembly bolts directly to factory mounting points with no grinding, drilling, or modification needed. It's a bolt-on replacement.