For 1990-2009 cars

1. Replace the exhaust manifold gaskets with new ones.

Notice: Refer to Fastener Notice in the Preface section.

2. Install the exhaust manifolds.

Tighten
Tighten the exhaust manifold retaining nits to 28 N·m (21 lb ft).

3. Install the exhaust manifold heat shields.

Tighten
Tighten the exhaust manifold heat shield bolts to 20 N·m (22 lb ft).

4. Connect the oxygen sensor connectors.
5. Replace the catalytic converter gasket with a new one.
6. Install the front exhaust pipe.

Tighten
Tighten the front exhaust pipe-to-front muffler nuts to 30 N·m (22 lb ft).

7. Replace the pup converter gasket with a new one.
8. Install the front exhaust pipe nuts.

Tighten
Tighten the front exhaust pipe nuts to 40 N·m (30 lb ft).

9. Install the front exhaust pipe lower bracket.

Tighten
Tighten the front exhaust pipe lower bracket bolts to 40 N·m (30 lb ft).

10. Install the intake manifold. Refer to Intake Manifold Replacement .