The old Kia Sorento with the 3.5 V6 was bad about disintegrating the variable intake manifold runner linkage bushings, causing a vacuum leak. Last time I did one, a metal replacement manifold with the butterflies, linkage and actuators was $15 from Kia.
Pros: metal replacement manifold
Cons: disintegrating linkage bushings
Vehicle:
Kia Sorento
