Bilstein B4 Suspension Genuine Bilstein part 26-147543

Bilstein Replacement FRONT and REAR shock absorbers PACKAGE, SET OF 4.



Bilstein Replacement for the Original Spec


Porsche 997 C2 / C2S - For vehicles with PASM, For vehicles with electronic suspension control

B4 High Quality direct replacement shock absorbers constructed and finished to Bilstein's high standards often far and above what the car was originally supplied with. They can actually be a performance improvement if replacing plain, none gas charged, oil filled dampers. They dramatically reduce cavitation / oil foaming, thus give for more stable damping forces when driven 'spiritedly'. Some surprising cars come with plain oil filled dampers.

Key Features:
- Twin Tube Damper
- Gas pressurized
- OE damping forces

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

BILSTEIN9972B4P

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Bilstein Replacement FRONT and REAR shock absorbers PACKAGE, SET OF 4.



Bilstein Replacement for the Original Spec

Fits:
Porsche 997 C4 / C4S / Turbo - For vehicles with PASM, For vehicles with electronic suspension control

B4 High Quality direct replacement shock absorbers constructed and finished to Bilstein's high standards often far and above what the car was originally supplied with. They can actually be a performance improvement if replacing plain, none gas charged, oil filled dampers. They dramatically reduce cavitation / oil foaming, thus give for more stable damping forces when driven 'spiritedly'. Some surprising cars come with plain oil filled dampers.

Key Features:
- Twin Tube Damper
- Gas pressurized
- OE damping forces

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

BILSTEIN9974B4P

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Bilstein B4 REAR (SET OF 2) shock absorber.



Bilstein Replacement for the Original Spec

Fits:
Porsche 997 C2 / C2S / C4 / C4S - Car with PASM electronic damper control (I475)

B4 High Quality direct replacement shock absorbers constructed and finished to Bilstein's high standards often far and above what the car was originally supplied with. They can actually be a performance improvement if replacing plain, none gas charged, oil filled dampers. They dramatically reduce cavitation / oil foaming, thus give for more stable damping forces when driven 'spiritedly'. Some surprising cars come with plain oil filled dampers.

Key Features:
- Twin Tube Damper
- Gas pressurized
- OE damping forces

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

26-147543KIT

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Front and Rear shock absorber set, SET OF 4.
These replacement shock absorbers are compatible with PASM-equipped cars and include built-in cancellation resistors to eliminate dashboard errors. They effectively bypass the Active Suspension Management system, allowing the vehicle to function as though it has standard suspension installed.

Set includes:
 2 × 99734304524 – OE Match Front shock absorbers (left + right)
 2 × 99733305332 – OE Match Rear shock absorbers (left + right)


Replacement for Car with PASM Electronic Damper Control (option code: 475)
Porsche 997.1 Carrera 2 3.6L 
Porsche 997.1 Carrera 2S 3.8L 
Porsche 997.2 Carrera 2 3.6L 
Porsche 997.2 Carrera 2S 3.8L 

• These shock absorbers are not PASM dampers and do not offer PASM-adjustable damping.
• They are designed as standard replacement units with built-in electronics to cancel PASM fault warnings.
• For correct functionality and proper vehicle handling, they must be installed as a full set of four (2 × front shock absorbers + 2 × rear shock absorbers) 
•  Mixing PASM units with OEMatch replacement units is not permitted and may result in suspension imbalance or fault messages.       

Over time, shock absorbers lose their ability to control movement, leading to a less stable, bouncier and less predictable car. Replacing all four dampers at once ensures perfectly matched suspension behavior, consistent ride comfort and proper chassis balance across front and rear.

When to Replace:
• Noticeable bounce, float or instability
• Leaking shock oil on any corner
• Front-end dive under braking or rear squat under acceleration
• Rough ride quality, vibration or knocking noises
• Uneven tyre wear or alignment issues
• Full suspension refresh on higher-mileage 997 models

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

SUSPENSIONKIT997C2

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