How to Tune an Opel Calibra

Written by matt wooddy
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The Opel Calibra was a two-door automobile introduced in 1989. Sold in other countries under the Chevrolet and Holden names, the car came standard with a 2.0L inline four-cylinder motor, with the options to upgrade to a 2.0L turbo and a 2.5L V6. Even though production was discontinued after the 1997 model year, the car remains a popular tuning car among small-engine enthusiasts. A few simple tune-ups on your Calibra's engine can be done at home in an afternoon.

Skill level:
Moderately Challenging

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Things you need

  • Cold air intake kit
  • Cat-back exhaust system
  • Metric wrench set
  • Flathead screwdriver
  • Antiseize compound liquid
  • Jack stands

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    Cold Air Intake

  1. 1

    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.

  2. 2

    Unscrew the bolts that hold the factory air filter housing box in place. Lift this box out of the engine with the old air filter inside.

  3. 3

    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.

  4. 4

    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.

  5. 5

    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.

    Cat-back Exhaust

  1. 1

    Lift the front and rear end of your Calibra off of the ground, each end individually. Place jack stands behind each of the front wheels underneath the frame, then lower the front onto these stands. Repeat this process for the rear of the car, placing the jack stands in front of the rear wheels.

  2. 2

    Crawl under the middle of the vehicle and lubricate the bolts and nuts that hold the full exhaust system into place. Loosen these parts to remove the factory exhaust system.

  3. 3

    Slide the old cat-back exhaust and muffler from above the rear axle once all bolts and nuts have been removed. Place the old system to the side; you will need to dispose of these pipes properly later.

  4. 4

    Slide the new exhaust piping system and muffler into place directly where the old one was removed. Begin installing the hanging hardware but do not completely tighten. Coat the overlap in the pipes with an antiseize compound. Tighten all of the bolts and nuts.

  5. 5

    Raise each of the ends of the Calibra off of the jack stands and remove these stands. Lower the car back to the ground so all four wheels are touching the ground again.

Tips and warnings

  • Wear protective eyewear and gloves during tuning

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