For 1990-2009 cars

1. Remove air injection vacuum hose.
2. Remove air injection check valve pipe, clamps, and bolt.
3. Remove air injection solenoid switch and bolt.
4. Remove air injection check valve front nuts.
5. Remove air injection check valve rear nuts.
6. Remove air injection check valve front bracket and bolt.
7. Remove air injection check valve rear bracket and nuts.
8. Remove air injection check valve pipe adapters, front.
9. Remove air injection check valve pipe adapters, rear.