Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSSUBARU2016LEGACY 2.5IREPAIR AND DIAGNOSISENGINE MECHANICALEXHAUST SYSTEM (H4DO)FRONT EXHAUST PIPEINSTALLATION

2016 Subaru Legacy 2.5i

Front Exhaust Pipe: Installation

2016 Subaru Legacy 2.5iSECTION Installation

Install the front exhaust pipe and center exhaust pipe as a unit to the vehicle.
NOTE: Use a new gasket.
Temporarily tighten the nuts which hold front exhaust pipe to cylinder heads.

Fig 1: Locating Center Exhaust Pipe Assembly Nuts
Courtesy of SUBARU OF AMERICA, INC.
Install the bolts, springs, and nuts which secure the rear exhaust pipe to the center exhaust pipe.
NOTE: Use a new gasket.

Tightening torque:

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

Fig 2: Locating Rear Exhaust Pipe Bolts
Courtesy of SUBARU OF AMERICA, INC.
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)

Fig 3: Locating Center Exhaust Pipe Bolt
Courtesy of SUBARU OF AMERICA, INC.
Tighten the nuts which hold front exhaust pipe to cylinder heads.
Tightening torque:

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

Fig 4: Locating Center Exhaust Pipe Assembly Nuts
Courtesy of SUBARU OF AMERICA, INC.
Connect the front oxygen (A/F) sensor connector (A) and rear oxygen sensor connector (B), and fasten the harness with the clip (C).

Fig 5: Identifying Front And Rear Oxygen (A/F) Sensor Connector
Courtesy of SUBARU OF AMERICA, INC.
Install the under cover. < Ref. to INSTALLATION , Front Under Cover. >
Lower the vehicle.
Connect the ground terminal to battery sensor. < Ref. to BATTERY , NOTE, Repair Contents. >

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.