Its got a flange between it. Basically a big metal gasket that is pressed together.
The manifold cracks because the ac drip line drops on it. Common problem.
The 4 catalytic converters usually go out between 100,000 and 150,000 miles.
new engine,1.7 rocker arms,Pipes exhaust, shorty cats , shorty headers,under drive and overdrive pulleys,4.2 upper plenum, throttle body spacer, cold air intake, stage one clutch, shorty shifter, and tune. 8.8 in storage