How to Tune an Opel Calibra
Cold Air Intake
Disconnect the vacuum hoses and electrical wiring that attach to the factory intake tube. Unfasten the hardware that holds the intake tube to the engine’s throttle body on naturally aspirated Calibra engines. If your engine is turbocharged, remove the factory intake tube from the intake inlet on the turbocharger. Unfasten the clamp that holds the intake tube to the factory air box and remove this intake tube from the engine and dispose of properly.
Unscrew the bolts that hold the factory air filter housing box in place. Lift this box out of the Opel Calibra engine with the old air filter inside.
Position the straight intake tube into place where the old one was removed. Use the provided silicone coupling and clamp to secure the intake tube to the inlet, whether on the turbocharger or throttle body.
Connect the smaller intake tube to the open end of the newly installed intake tube. Position this smaller tube so it points toward the front of the vehicle, at a downward angle. Attach the new air filter to the small intake tube and secure with the fastening clamp.
Reconnect the necessary hoses and electrical wiring to the new intake tube. Plug any remaining holes with the grommets that came with your cold air intake kit.