Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 88
ME(STI)-114
Engine Noise
MECHANICAL
EXHAUST
EX(STI)
Page
General Description . . . . . . . . . . . . . . . . . . . . ...2
Front Exhaust Pipe . . . . . . . . . . . . . . . . . . . . . .6
Center Exhaust Pipe . . . . . . . . . . . . . . . . . . . . ..8
Joint Pipe . . . . . . . . . . . . . . . . . . . . . . . . .12
Rear Exhaust Pipe . . . . . . . . . . . . . . . . . . . . ...13
Muffler . . . . . . . . . . . . . . . . . . . . . . . . . ..15
EX(STI)-2
General Description
EXHAUST
1. General Description
A: COMPONENT
1. FRONT EXHAUST PIPE
(1)
Gasket
(8)
Exhaust manifold LH inner cover
(15) Ground cable
(2)
Exhaust manifold RH upper cover
(9)
Exhaust manifold LH outer cover
(3)
Exhaust manifold RH
(10) Gasket
Tightening torque: N·m (kgf-m, ft-lb)
(4)
Exhaust manifold RH lower cover
(11) Joint pipe
T1: 19 (1.9, 14.0)
(5)
Gasket
(12) Gasket
T2: 40 (4.1, 29.5)
(6)
Front exhaust pipe
(13) Front oxygen (A/F) sensor
T3: 42.5 (4.3, 31.3)
(7)
Gasket
(14) Exhaust manifold LH
T4: <Ref. to FU(STI)-54, INSTALLA-
EX-02726
T1
T1
T3
T3
T2
T1
T1
(1)
(3)
(1)
(9)
(8)
(6)
(11)
(12)
(14)
(10)
(4)
(2)
(13)
T2
T4
(5)
(7)
(15)
T3
T3
T3
A
A
B
B
EX(STI)-3
General Description
EXHAUST
2. CENTER AND REAR EXHAUST PIPE, AND MUFFLER
• 4 door model
(1)
Gasket
(12) Chamber
Tightening torque: N·m (kgf-m, ft-lb)
(2)
Front catalytic converter
(13) Cushion rubber
T1: 13 (1.3, 9.6)
(3)
Center exhaust pipe (front)
(14) Spring
T2: 18 (1.8, 13.3)
(4)
Center exhaust pipe (rear)
(15) Bolt
T3: 23 (2.3, 17.0)
(5)
Gasket
(16) Gasket
T4: 30 (3.1, 22.1)
(6)
Center exhaust pipe upper cover
(17) Self-locking nut
T5: 35 (3.6, 25.8)
(7)
Clamp
(18) Muffler LH
T6: 40 (4.1, 29.5)
(8)
Rear oxygen sensor
(19) Muffler RH
T7: 42.5 (4.3, 31.3)
(9)
Rear catalytic converter
(20) Hanger bracket (5MT model)
T8: 48 (4.9, 35.4)
(10) Gasket
(21) Hanger bracket (6MT model)
T9: <Ref. to FU(STI)-56, INSTALLA-
TION, Rear Oxygen Sensor.>
<Ref. to FU(w/o STI)-55,
INSTALLATION, Rear Oxygen
Sensor.>
(11) Rear exhaust pipe
EX-02727
(17)
(10)
(11)
(12)
(15)
(14)
(13)
(13)
(16)
(13)
(16)
(18)
(19)
(13)
(13)
(17)
(17)
(17)
T8
T8
T8
T8
(9)
T5
T7
T2
(6)
(4)
(8)
(7)
T2
T1
A
T9
(5)
T4
T7
T7
(1)
(2)
(3)
A
T3
(21)
T6
(20)
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