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Porsche Cylinder Base O-Ring German 99970739440

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Porsche 911

2002 Porsche 911 GT2

Coupe 996t 3.6L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2003 Porsche 911 GT2

Coupe 996t 3.6L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2004 Porsche 911 Anniversary Edition

Coupe 996 3.6L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2004 Porsche 911 Carrera

Coupe 996 3.6L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2004 Porsche 911 Carrera 4S

Coupe 996 3.6L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2004 Porsche 911 GT2

Coupe 996t 3.6L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2004 Porsche 911 GT3

Coupe 996 3.6L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2004 Porsche 911 Turbo

Coupe 996 3.6L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2005 Porsche 911 Carrera

Coupe 996 3.6L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2005 Porsche 911 Carrera 4S

Coupe 996 3.6L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2005 Porsche 911 GT2

Coupe 996 3.6L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2005 Porsche 911 GT3

Coupe 996 3.6L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2005 Porsche 911 Turbo

Coupe 996 3.6L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2005 Porsche 911 Turbo S

Coupe 996 3.6L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2007 Porsche 911 Carrera

Coupe 997 3.6L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2007 Porsche 911 Carrera 4

Coupe 997 3.6L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2007 Porsche 911 GT3

Coupe 997 3.6L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2007 Porsche 911 GT3 RS

Coupe 997 3.6L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2007 Porsche 911 Turbo

Coupe 997 3.6L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2008 Porsche 911 Carrera

Convertible 997 3.6L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2008 Porsche 911 Carrera

Coupe 997 3.6L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2008 Porsche 911 Carrera 4

Convertible 997 3.6L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2008 Porsche 911 Carrera 4

Coupe 997 3.6L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2008 Porsche 911 GT2

Coupe 997 3.6L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2008 Porsche 911 GT3

Coupe 997 3.6L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2008 Porsche 911 GT3 RS

Coupe 997 3.6L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2008 Porsche 911 Turbo

Convertible 997 3.6L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2008 Porsche 911 Turbo

Coupe 997 3.6L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2009 Porsche 911 Carrera

Convertible 997 3.6L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2009 Porsche 911 Carrera

Coupe 997 3.6L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2009 Porsche 911 Carrera 4

Convertible 997 3.6L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2009 Porsche 911 Carrera 4

Coupe 997 3.6L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2009 Porsche 911 GT2

Coupe 997 3.6L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2009 Porsche 911 Turbo

Convertible 997 3.6L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2009 Porsche 911 Turbo

Coupe 997 3.6L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2010 Porsche 911 Carrera 4S

Coupe 997 3.8L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2010 Porsche 911 Carrera S

Coupe 997 3.8L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2010 Porsche 911 GT3

Coupe 997 3.8L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2010 Porsche 911 GT3 RS

Coupe 997 3.8L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2010 Porsche 911 Turbo

Coupe 997 3.8L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2011 Porsche 911 Carrera 4S

Coupe 997 3.8L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2011 Porsche 911 Carrera GTS

Coupe 997 3.8L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2011 Porsche 911 Carrera S

Coupe 997 3.8L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2011 Porsche 911 GT3

Coupe 997 3.8L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2011 Porsche 911 GT3 RS

Coupe 997 3.8L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2011 Porsche 911 GT3 RS 4.0

Coupe 997 4.0L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2011 Porsche 911 Turbo

Coupe 997 3.8L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

2011 Porsche 911 Turbo S

Coupe 997 3.8L H6

Quantity needed: 12

Fitment note: Cylinder Base O-Ring - Cylinder Housing to Engine Case (110 X 2.5 mm); Black Viton.

Manufacturer: German

SKU: 99970739440-127

Price

MSRP: $27.39

-69%

Price: $8.45

Availability: In stock

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Porsche Cylinder Base O-Ring German 99970739440

Porsche Cylinder Base O-Ring German 99970739440

MSRP: $27.39

-69%

Price: $8.45

The Porsche Cylinder Base O-Ring German 99970739440 is a precision-engineered aftermarket component from German, designed for critical sealing between the cylinder housing and engine case. Manufactured to Porsche’s specifications for select 911 models, this Black Viton O-Ring (110 x 2.5 mm) ensures long-lasting oil-tight performance.

Key Features:

Manufacturer: German
Aftermarket part, manufacturer part number 99970739440
Black Viton construction for exceptional durability
Specifically designed for use at the cylinder base (cylinder housing to engine case)

Verified Fitment: Engineered for a wide range of Porsche 911 variants, including:

911 (2002-2005, chassis 996: GT2, Anniversary Edition, Carrera, Carrera 4S, GT3, Turbo, Turbo S)
911 (2007-2011, chassis 997: Carrera, Carrera 4, Carrera 4S, Carrera S, Carrera GTS, GT2, GT3, GT3 RS, GT3 RS 4.0, Turbo, Turbo S)
911 (2008-2009, chassis 997: Carrera, Carrera 4, Turbo; convertible body styles included on specified models)

Ideal for high-performance engine rebuilds and maintenance, the German 99970739440 Cylinder Base O-Ring delivers a tight, reliable seal for demanding applications. Use as specified—quantity per vehicle may vary by engine type.

Specifications

Product Type

Aftermarket

OE Part Number

999 707 394 40 / 99970739440

OEM

No

0.00

(0)

5

(0)

4

(0)

3

(0)

2

(0)

1

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