Installation and Conversion Instructions

911 (991)
2/16

ENU

2601

2

Sports Exhaust System (176)

Information:

Retrofitting

Model Year:

As of 2017 up to 2019

Vehicle type:

911 Carrera (991)/911 Carrera 4 (911)/911 Targa 4 (991)

Engine Type:

MDCKA (3.0 L)

Figure 1
Notes:

The sports exhaust system is activated and deactivated using the switch console with the additional
"Twin tailpipe" button. The sports exhaust system is also activated by pressing the “Sport” and “Sport
Plus” buttons. The sports exhaust system can be switched off separately in these modes using the "Twin
tailpipe" button.
Strip for switches and tailpipes must also be ordered. The switch console is modular and must be
assembled in accordance with the new vehicle equipment.
Engine power and exhaust behaviour of the vehicle are not affected.

Part
Information.:

991.044.200.30

 Sports exhaust system, set

Also order the following:
991.044.200.24

1x

991.613.955.50.DML1 1 x

 Tailpipe, silver, set
 Combined switch (switch console), I-no. 652, Coupé

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911 (991)
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Installation and Conversion Instructions

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991.613.957.50.DML1 1 x

 Combined switch (switch console), I-no. 653, Coupé

991.613.959.50.DML1

 Combined switch (switch console), I-no. 651, Coupé

1x

991.613.967.50.DML1 1 x

 Combined switch (switch console), I-no. 552, Cabriolet

991.613.963.50.DML1

 Combined switch (switch console), Targa

1

1x

Depending on vehicle equipment

Parts List:

Figure 2

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Page 2 of 30

9P1.254.400.A

1x

Left catalytic converter  Figure 2 -1-

9P1.251.263

2x

Seal  Figure 2 -2-

9P1.251.187.B2

1x

Tailpipe, silver  Figure 2 -3-

9P1.251.188.B2

1x

Tailpipe, silver  Figure 2 -4-

9P1.254.450.A

1x

Right catalytic converter  Figure 2 -5-

9P1.253.145

2x

Clamping sleeve  Figure 2 -6-

997.111.230.80

2x

Clamp  Figure 2 -7-

9P1.251.751

2x

Clamp on main silencer  Figure 2 -8-

999.073.418.01

2x

Tapping screw, ST 4.8 x 19-C  Figure 2 -9-

999.076.091.01

2x

Hexagon nut, M6  Figure 2 -10-

996.505.649.01

1x

Bracket  Figure 2 -11-

9P1.251.053.A

1x

Main silencer  Figure 2 -12-

991.505.811.04OK1

1x

Rear apron (black, grained)  Figure 2 -13-

991.505.651.04OK1

1x

Tailpipe cover (black, grained)  Figure 2 -14-

991.505.639.03

1x

Rear support  Figure 2 -15-

991.505.475.04

1x

Heat shield  Figure 2 -16-

999.507.309.02

4x

Speed nut, ST 4.8 (not shown)

Tequipment

Installation and Conversion Instructions
999.084.642.02

8x

Hexagon nut, M8 (not shown)

911 (991)
2/16

ENU

2601

991.505.837.02

1x

Lower retaining strip, middle (not shown)

991.505.837.03

2x

Lower retaining strip, outer (not shown)

999.190.191.30

3x

Blind rivet, A3.2 x 17 (not shown)

9A7.007.483.00

4x

Torx screw (for securing seat), (not shown)

9P3.974.280

1x

Wire harness for sports exhaust system (not shown)

999.650.531.00

1x

Cable ring eyelet (not shown)

999.650.566.22

1x

Socket contact (not shown)

991.044.200.15

1x

Cable casing (not shown)

999.073.227.09

1x

Tapping screw, ST 4.8 x 19 (not shown)

N 020.904.4

15 x

Tie-wrap (not shown)

999.073.236.0A

8x

Countersunk screw, M6 x 10 (for securing heat shield for
turbocharger)

2

2

Contained in set 991.044.200.24.

Figure 3
Parts included for vacuum supply system
9P1.251.838.A

1x

Vacuum line, metal  Figure 3 -1-

900.918.005.40

1x

Plastic tube (5 x 1 x 1,000 mm)  Figure 3 -2-

06E.133.794

3x

T-piece  Figure 3 -3-

999.651.363.01

1x

Cable holder  Figure 2 -4-

999.512.707.00

4x

One-ear hose clamp, 9.6-11.3  Figure 3 -5-

999.651.401.01

4x

Clip (for securing vacuum line, metal)  Figure 3 -6-

9A1.110.666.00

2x

Moulded hose  Figure 3 -7-

999.239.048.40

1x

Connecting hose (4.5 x 2.5 x 28 mm)  Figure 3 -8-

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911 (991)
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Installation and Conversion Instructions

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Materials:

190-mm steel flexi-pipe  Figure 3 -9-

1x

991.111.504.00
991.111.502.00

1x

93-mm steel flexi-pipe  Figure 3 -10-

7PP.906.283.F

1x

Change-over valve  Figure 3 -11-

999.181.518.50

1x

Protective tube, L = 50 mm  Figure 3 -12-

000.043.172.00

1x

Sealing cord

000.043.004.82

1x

Optimol-HT mounting paste

———

Rust solvent, commercially available, e.g. WD40

Identifying features when installed:
In addition to the Porsche logo, a part number is shown on the main silencer, catalytic converters and
tailpipes.

Notes:

The relevant legal regulations must be observed in the various countries.
9900 - PIWIS Tester 3

Tools:

T10118 - Assembly tool
P300 - Socket-wrench insert
Transmission and Engine Jack
Assembly:

1

Preparatory work:
1.1

Move convertible top to service position.
1.1.1

Cabriolet:  Workshop Manual '6101IN Convertible-top service position
(Cabriolet)'

1.1.2

Targa:  Workshop Manual '6101IN05 Convertible-top service position'

WARNING
Moving components
•

Danger of limbs being trapped or severed



Do not reach into the danger area.



Secure the system to prevent it from being activated accidentally.



Keep third parties away from the danger area.

Feb 28, 2020
Page 4 of 30

1.2

Extend the rear spoiler manually using the rocker switch in the passenger compartment.

1.3

Remove left door sill trim.  Workshop Manual '680519 Removing and installing inner door
sill trim'

1.4

Remove left front seat.  Workshop Manual '72011901 Removing and installing front seat'

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Installation and Conversion Instructions

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2

1.5

Remove rear seat cushion.  Workshop Manual '745719 Removing and installing rear seat
cushion'

1.6

Only for Targa:
Remove trim panels and cover in the
passenger compartment.
1.6.1

Remove center trim panel  Figure
4 -1- and trim panel at the left side
 Figure 4 -2- from the roll-over
bar.  Workshop Manual '708119
Removing and installing trim panel
for roll-over bar'

1.6.2

Remove rear side trim panel at the
left  Figure 4 -3-.  Workshop
Manual '707519 Rear side trim
panel'