Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual — part 88

ME(STI)-114

Engine Noise

MECHANICAL

EXHAUST

EX(STI)

Page

1.

General Description . . . . . . . . . . . . . . . . . . . . ...2

2.

Front Exhaust Pipe . . . . . . . . . . . . . . . . . . . . . .6

3.

Center Exhaust Pipe . . . . . . . . . . . . . . . . . . . . ..8

4.

Joint Pipe . . . . . . . . . . . . . . . . . . . . . . . . .12

5.

Rear Exhaust Pipe . . . . . . . . . . . . . . . . . . . . ...13

6.

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-

TION, Front Oxygen (A/F) Sen-
sor.> <Ref. to FU(w/o STI)-53,
INSTALLATION, Front Oxygen
(A/F) Sensor.>

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)