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BILSTEIN9972B4P
Product Information
Product Information
Bilstein Replacement FRONT and REAR shock absorbers PACKAGE, SET OF 4.

bilstein

Bilstein Replacement for the Original Spec

fr
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Related, superseded, cross reference or alternative numbers for comparison.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
22-147530
22147530
26-147543
26147543
99734304513
99734304514
99734304516
99734304521
99734304522
99734304523
99734304513
99734304514
99734304516
99734304517
99733305337
99734304524
99733305332

The product you are viewing cross references to these numbers
BILSTEIN9974B4P
Product Information
Product Information
Bilstein Replacement FRONT and REAR shock absorbers PACKAGE, SET OF 4.

bilstein

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Related, superseded, cross reference or alternative numbers for comparison.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
22-147554
22-147561
26-147543
22147554
22147561
26147543
99733304903
99733305320
99733305325
99733305330
99733305327
26147543
99733305324
99733305336
99733305332

The product you are viewing cross references to these numbers
26-147543
Product Information
Product Information
Bilstein Original Equipment Shock Absorber

bilstein

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

Please Note:
Price is for each damper you will need to buy 2

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Related, superseded, cross reference or alternative numbers for comparison.

26-147543
99733305337
99733305332

The product you are viewing cross references to these numbers
DISPLAYING 1 to 3 (of 3 products)
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About Bilstein cars with PASM

Bilstein with PASM

At Design911, we supply Bilstein dampers specifically for Porsche models equipped with PASM (Porsche Active Suspension Management), helping you retain the factory adaptive damping functions while renewing tired or faulty suspension components.

Bilstein with PASM

Bilstein PASM-compatible dampers are designed to work with the original Porsche adaptive control system, so your Comfort/Sport modes and dashboard controls continue to operate as intended while you restore ride control and stability.

Why do Bilstein with PASM matter?

On PASM-equipped Porsche models, the dampers are closely integrated with the car’s control systems. When they age or fail, you can experience warning lights, inconsistent behaviour between modes, or a loss of the balanced feel the car had when new. Using PASM-compatible Bilstein units allows you to renew worn components without deleting or bypassing the adaptive features that are central to how these cars drive.

  • Keep your Porsche PASM system operating as Porsche intended, with working mode selection
  • Restore consistent, controlled damping where original units are worn or leaking
  • Address PASM-related fault messages when the damper itself is the underlying issue
  • Support long-term enjoyment and confidence in PASM-equipped Porsche models

Individual replacement dampers

Bilstein PASM-compatible units that allow you to replace only the affected corners or axles on your Porsche while retaining the factory control strategy.

  • Suitable when one or more original PASM dampers is leaking or faulty
  • Lets you keep the rest of the suspension close to standard specification
  • Useful for targeted renewal on higher-mileage cars

Matched axle sets

Dampers supplied for a full axle (front or rear) so that both sides are renewed together for consistent behaviour and response.

  • Helps maintain even damping left to right
  • Reduces the risk of mixed wear levels on the same axle
  • A sensible choice when carrying out planned suspension refresh work

Complete suspension packages

In some cases, PASM-compatible Bilstein dampers are combined with associated hardware or other suspension components to simplify a more extensive refresh or upgrade.

  • Brings key parts together in one package for convenience
  • Supports more comprehensive suspension restoration on PASM-equipped Porsche models
  • Useful when working on higher-mileage or heavily used cars

Brands available in this category

For this category we stock a wide choice of trusted brands for Porsche models. You can also browse and filter by brand on this page to focus on your preferred manufacturers.

  • Bilstein – PASM-compatible dampers developed for Porsche models with factory active suspension, aimed at maintaining the intended balance between comfort and control while renewing worn components.

When should you review or replace your Bilstein with PASM shock absorbers?

On PASM-equipped Porsche models, it is worth paying attention to how the system behaves and to any changes in ride or dashboard messages. Because the dampers are managed electronically, issues may show up as both physical symptoms and warning lights.

  • You see PASM warnings or mode-related fault messages on the dashboard
  • Damping feels inconsistent between modes or appears stuck in one behaviour
  • There are knocks, leaks or obvious signs of wear at the dampers themselves
  • The car no longer feels as composed over bumps as it did, despite correct tyres and geometry

If any of these apply, it is a good time to inspect the PASM system and associated components. When the fault traces back to the damper units, replacing them with PASM-compatible Bilstein parts can help restore normal behaviour while retaining the original functionality.

Explore Bilstein with PASM with Design911

Browse Bilstein options for PASM-equipped Porsche models at Design911 — from individual replacement dampers to axle sets — and find solutions that work with your car’s existing adaptive suspension control while renewing tired components.

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