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Home >> Subaru >> 2018 >> WRX STI Limited >> Repair and Diagnosis >> Engine Mechanical >> Exhaust System (STI) >> Center Exhaust Pipe >> Installation

Center Exhaust Pipe: Installation

  1. Set the turbocharger lower cover, and temporarily tighten the bolts that hold the lower side of the turbocharger lower cover.
  2. Install the center exhaust pipe and temporarily tighten the bolt which holds center exhaust pipe to hanger bracket.
  3. Temporarily tighten the bolt which holds the center exhaust pipe to the transmission.
  4. Install the center exhaust pipe along with the turbocharger cover stay (A) to the turbocharger.
    NOTE: Use a new gasket.

    Tightening Torque:

    42.5 N.m (4.3 kgf-m, 31.3 ft-lb)

    G05955334
    G06345300
  5. Install the rear exhaust pipe to center exhaust pipe.
    NOTE: Use a new gasket.

    Tightening Torque:

    18 N.m (1.8 kgf-m, 13.3 ft-lb)

    G10265512
  6. Connect the connector to the rear oxygen sensor, and hold the rear oxygen sensor harness with the clip (A).
    G06344730
  7. Tighten the bolt which holds center exhaust pipe to transmission.

    Tightening Torque:

    30 N.m (3.1 kgf-m, 22.1 ft-lb)

    G05661009
  8. Tighten the bolts which secure the center exhaust pipe to the hanger bracket.

    Tightening Torque:

    35 N.m (3.6 kgf-m, 25.8 ft-lb)

    G10265514
  9. Lower the vehicle.
  10. Attach the bolt which holds the upper side of the turbocharger lower cover.

    Tightening Torque:

    7.5 N.m (0.8 kgf-m, 5.5 ft-lb)

    G08539440
  11. Attach the turbocharger upper cover.

    Tightening Torque:

    7.5 N.m (0.8 kgf-m, 5.5 ft-lb)

    G08539115
  12. Install the intercooler stay RH No. 2.

    Tightening Torque:

    16 N.m (1.6 kgf-m, 11.8 ft-lb)

    G04998819
  13. Lift up the vehicle.
  14. Tighten the bolts that secure the lower side of the turbocharger lower cover.

    Tightening Torque:

    7.5 N.m (0.8 kgf-m, 5.5 ft-lb)

    G05661003
  15. Install the transmission under cover.

    Tightening Torque:

    18 N.m (1.8 kgf-m, 13.3 ft-lb)

  16. Lower the vehicle.
  17. Install the intercooler. Ref. to INTAKE (INDUCTION) (STI)>Intercooler>INSTALLATION .
  18. Connect the battery ground terminal.