See your warranty book before using your vehicle for racing or other competitive driving. After reviewing your warranty book, please see the GM Performance Parts website or catalog and contact the race sanctioning bodies, for example Sports Car Club of America (SCCA) or Grand American, for parts and equipment required for racing or other competitive driving.
Chevrolet Cobalt Service & Repair Manual. Intake Manifold, Replace
Removal
1.
Remove air inlet duct and resonator.
2.
Disconnect IAC, TPS and MAP sensor.
3.
Disconnect EVAP and PCV hose.
4.
Disconnect purge solenoid tube and
brake booster hose.
...