jounce bumper Genuine Porsche part 99970349150

Front Shock Absorber Top Mount & Overhaul Kit.
Restore the top mount assembly of your Porsche 987 Boxster's front suspension with this complete overhaul kit. The kit includes top mounts and full set of related bearing, mount and hardware components. This ensures a comprehensive replacement of the front strut top mount, eliminating play, restoring mount integrity and renewing suspension behaviour.

Fits:

• Porsche Boxster 987 2.7L 2005 -08/08 Cars without PASM
• Porsche Boxster 987 S 3.2/3.4L 2005-08/08  Cars without PASM

Diagram Ref No 2, 3, 4, 5, 6, 8, 9, 10, 11, 15

What This Product Does:

• The top mount (sometimes called “strut mount” or “shock absorber top mount”) is the connection between the top of the front shock/strut assembly and the vehicle’s body (strut tower). It supports the load of the spring/damper, allows the strut to swivel for steering input, and isolates vibration/noise.
• Over time, the mount rubber or bearing can degrade, which reduces performance, adds noise, lets the strut shift slightly under load, or causes steering feel degradation. An overhaul kit means you’re replacing not just the top mount but all the relevant top-mount components to restore the assembly to like-new specification.
  
  

Signs Of Needing Replacement:

• Safety & performance: A worn top mount can compromise how the front suspension behaves under load—knocks, poor steering feel, misalignment of the strut and reduced contact patch of the tyre.
  
• Noise/vibration issues: Old or damaged mounts can introduce clunks, creaks, or vibrations when going over bumps or steering, which degrade the driving experience and signal mount degradation.
  
  

Why Replacement Matters:

• Camber/caster control & geometry: Especially on sports cars like Porsche, the front strut mount is integral to maintaining correct geometry. A compromised mount allows movement under load, changing angle and affecting tyre wear or handling.
  
• Cost-effectiveness: Since the strut top mount is accessed when you’re doing front suspension work (shocks/struts removal), replacing the mount kit at the same time avoids future labour costs and ensures you don’t just replace part of the assembly.

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Related, superseded, cross reference or alternative numbers for comparison.

SUSPENSIONKIT987-FR-1

The product you are viewing cross references to these numbers

Front Shock Absorber Top Mount & Overhaul Kit.
Restore the top mount assembly of your Porsche 987 Boxster's front suspension with this complete overhaul kit. The kit includes top mounts and full set of related bearing, mount and hardware components. This ensures a comprehensive replacement of the front strut top mount, eliminating play, restoring mount integrity and renewing suspension behaviour.

Fits:

• Porsche Boxster 987 2.7L 2005 -08/08 Cars with PASM
• Porsche Boxster 987 S 3.2/3.4L 2005-08/08  Cars with PASM

Diagram Ref No 2, 3, 4, 5, 6, 8, 9, 10, 11, 15

What This Product Does:

• The top mount (sometimes called “strut mount” or “shock absorber top mount”) is the connection between the top of the front shock/strut assembly and the vehicle’s body (strut tower). It supports the load of the spring/damper, allows the strut to swivel for steering input, and isolates vibration/noise.
• Over time, the mount rubber or bearing can degrade, which reduces performance, adds noise, lets the strut shift slightly under load, or causes steering feel degradation. An overhaul kit means you’re replacing not just the top mount but all the relevant top-mount components to restore the assembly to like-new specification.
  
  

Signs Of Needing Replacement:

• Safety & performance: A worn top mount can compromise how the front suspension behaves under load—knocks, poor steering feel, misalignment of the strut and reduced contact patch of the tyre.
  
• Noise/vibration issues: Old or damaged mounts can introduce clunks, creaks, or vibrations when going over bumps or steering, which degrade the driving experience and signal mount degradation.
  
  

Why Replacement Matters:

• Camber/caster control & geometry: Especially on sports cars like Porsche, the front strut mount is integral to maintaining correct geometry. A compromised mount allows movement under load, changing angle and affecting tyre wear or handling.
  
• Cost-effectiveness: Since the strut top mount is accessed when you’re doing front suspension work (shocks/struts removal), replacing the mount kit at the same time avoids future labour costs and ensures you don’t just replace part of the assembly.

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

SUSPENSIONKIT987-FR-2

The product you are viewing cross references to these numbers

Front Shock Absorber Top Mount & Overhaul Kit.
Restore the critical upper mounting point of your front suspension with this comprehensive overhaul kit.

Fits:

• Porsche Boxster 987 MKII 2.9L 2009-2012 (For Cars Without PASM)
• Porsche Boxster S 987 MKII 3.4L 2009-2012 (For Cars Without PASM)

Diagram Ref No 2, 3, 4, 5, 6, 8, 9, 10, 11, 15

What This Product Does:

• The top mount (strut mount) is the interface between the top of your front shock/strut assembly and the vehicle’s body (the strut turret or tower). It supports loads from the spring and damper, allows strut rotation/steering movement (via the bearing) and isolates road noise/vibration from the body.
• Over time, the mounts wear: rubber becomes fatigued, bearings get play, hardware corrodes, dust boots degrade, bump stops deteriorate. This leads to unwanted movement, noise, steering issues, or sub-par suspension behaviour.
• The overhaul kit replaces the mount, the bearing, and all ancillary hardware (dust covers, bump stops, washers, lock nuts) so the top of your strut assembly is restored to a like-new condition — improving longevity, reducing noise, improving steering feel and restoring correct suspension geometry.
  
  

When You Should Consider Replacement:

• You notice clunking or knocking noises from the top of the front strut tower when driving over bumpy roads or during steering inputs — a failing mount or bearing often causes this.
  
• You hear creaking or squeaking when steering or as the suspension cycles — indication of worn bearing or mount.
  
• You feel reduced steering precision or vague handling, especially under load — the strut top may be moving or deflecting.
  
• You're replacing your front shocks/struts or doing front suspension work—since the top mount must be removed, replacing the full kit while you’re in there is good preventative maintenance.
• The mount or hardware is beyond its service life — high mileage, harsh environment, or compromised previous repairs.

Why Replacement Matters:

• Safety & ride quality: The top mount is a key structural point. If it’s worn, suspension movement can become non-controlled, which can degrade ride comfort, dynamic response, and safety.
  
• Noise & comfort: Old mounts often let vibration or noise transmit into the cabin (knocks, creaks). A fresh mount kit eliminates many of these NVH (noise, vibration, harshness) symptoms.
  
• Steering & geometry preservation: On a sports car like a Porsche, correct suspension geometry is essential. A compromised mount allows unintended movement under load, which can upset camber/caster alignment, tyre contact patch and therefore handling.
  
• Cost effectiveness: Since the front strut top mount is accessed during strut replacement or front suspension work, installing the kit at the same time avoids having to redo labour later.
  
• Prevent further damage: If the mount fails completely, more serious damage to the strut assembly or body mount could result. Replacing proactively prevents that risk.

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

SUSPENSIONKIT987.2-FR-1

The product you are viewing cross references to these numbers

Front Shock Absorber Top Mount & Overhaul Kit.
Restore the critical upper mounting point of your front suspension with this comprehensive overhaul kit.

Fits:

• Porsche Boxster 987 MKII 2.9L 2009-2012 (For Cars With PASM)
• Porsche Boxster S 987 MKII 3.4L 2009-2012 (For Cars With PASM)

Diagram Ref No 2, 3, 4, 5, 6, 8, 9, 10, 11, 15

What This Product Does:

• The top mount (strut mount) is the interface between the top of your front shock/strut assembly and the vehicle’s body (the strut turret or tower). It supports loads from the spring and damper, allows strut rotation/steering movement (via the bearing) and isolates road noise/vibration from the body.
• Over time, the mounts wear: rubber becomes fatigued, bearings get play, hardware corrodes, dust boots degrade, bump stops deteriorate. This leads to unwanted movement, noise, steering issues, or sub-par suspension behaviour.
• The overhaul kit replaces the mount, the bearing, and all ancillary hardware (dust covers, bump stops, washers, lock nuts) so the top of your strut assembly is restored to a like-new condition — improving longevity, reducing noise, improving steering feel and restoring correct suspension geometry.
  
  

When You Should Consider Replacement:

• You notice clunking or knocking noises from the top of the front strut tower when driving over bumpy roads or during steering inputs — a failing mount or bearing often causes this.
  
• You hear creaking or squeaking when steering or as the suspension cycles — indication of worn bearing or mount.
  
• You feel reduced steering precision or vague handling, especially under load — the strut top may be moving or deflecting.
  
• You're replacing your front shocks/struts or doing front suspension work—since the top mount must be removed, replacing the full kit while you’re in there is good preventative maintenance.
• The mount or hardware is beyond its service life — high mileage, harsh environment, or compromised previous repairs.

Why Replacement Matters:

• Safety & ride quality: The top mount is a key structural point. If it’s worn, suspension movement can become non-controlled, which can degrade ride comfort, dynamic response, and safety.
  
• Noise & comfort: Old mounts often let vibration or noise transmit into the cabin (knocks, creaks). A fresh mount kit eliminates many of these NVH (noise, vibration, harshness) symptoms.
  
• Steering & geometry preservation: On a sports car like a Porsche, correct suspension geometry is essential. A compromised mount allows unintended movement under load, which can upset camber/caster alignment, tyre contact patch and therefore handling.
  
• Cost effectiveness: Since the front strut top mount is accessed during strut replacement or front suspension work, installing the kit at the same time avoids having to redo labour later.
  
• Prevent further damage: If the mount fails completely, more serious damage to the strut assembly or body mount could result. Replacing proactively prevents that risk.

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

SUSPENSIONKIT987.2-FR-2

The product you are viewing cross references to these numbers