Engine Mounts

Bolt for engine/gearbox mount support bracket. AM 10 x 55.

Fits:
Cars  with 6-speed manual transmission
Porsche 981 Boxster 2012 - 2016 
Porsche 981SP Boxster Spyder 2016
Porsche 982 Boxster 2017>>
Porsche 982SP Boxster Spyder 2019>>
Porsche 981C Cayman 2013 - 2016
Porsche 981C Cayman GT4 2016
Porsche 982C Cayman 2017>>
Porsche 982C Cayman GT4 2019>>

Diagram ref no 6 (engine) or 2 (gearbox).

Related reference numbers
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90037824901

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Engine and Gearbox hydraulic mount.



Fits:
For cars WITH Dynamic engine mount (PADM) - option code: I140
Porsche 981 Boxster 2012-16
Porsche 981 Boxster Spyder 2016
Porsche 981 Cayman 2014-16

Click 'Zoom in' for large parts diagram.
Diagram ref no 1

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98137505909

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Engine mount bush insert kit. Porsche 987 gen 1 Boxster /Cayman

Fits:
Porsche 987.1 Boxster 2.7ltr - 2008 to 2008
Porsche 987.1 Boxster S 3.2/3.4ltr - 2008 to 2008
Porsche 987.1 Cayman 2.7ltr - 2006 to 2008
Porsche 987.1 Cayman S 3.4ltr - 2005 to 2008

Choose between three hardness levels:

1. Soft (60A) - Orange: For added performance and to restore and preserve your OEM mount with minimal noise, vibration and harshness (NVH)
2. Sport (70A) - Yellow: For tuned and sport-oriented performance street cars, with less noise, vibration and harshness (NVH) than track versions
3. Track (80A) - Black: For optimized performance on track and racecars where noise, vibration and harshness (NVH) is not a consideration

The OEM engine mount was designed for ride comfort and is prone to sagging and tearing but, above all, it is a detriment to performance. The empty voids in the bush allow for too much engine movement, resulting in sloppy handling, numbed responsiveness and imprecise shifting.  
Racecars utilize a solid metal mount to mediate this but it is impractical for road use as it transfers extreme noise and vibration into the cabin.

So how do you achieve the benefits of a solid mount while retaining daily drivability?  We offer the most effective and easy to install solution for the Porsche 987.1 Boxster and Cayman. The durable urethane rubber insert simply slips in to fill and fortify the empty voids of the OEM bush, preventing premature wear and undesirable engine movement, all while transmitting minimal added noise and vibration.

The result? Handling is taut and predictable, power delivery is immediate and smooth and gear changes are crisp and confident.

Installation can be completed in about 1.5-hours for the 987.  

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

98737502305

The product you are viewing cross references to these numbers

Engine mount bush.



Fits:
Porsche 986 Boxster 1997-04
Porsche 987.1 Boxster 2005-08
Porsche 987C.1 Cayman 2006-08

Click 'Zoom in' for large parts diagram.
Fits to no. 2 on the diagram.

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98737502305

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Engine Mount Stop.


Fits:
Porsche 987 Boxster / S 2005-08
Porsche 987 Boxster / S 2009-12
Porsche 987C Cayman / S 2005-08
Porsche 987C Cayman / S 2009-12

This product supersedes Porsche's old part numbers:
- 98737525503
- 98737525505

Price is for each.

Click 'Zoom in' for large parts diagram.
Diagram Ref No 3

Related reference numbers
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9A137525701

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Engine mount with HD 95A shore rating bush 



Fits:
Porsche 986 Boxster 1997-04
Porsche 987.1 Boxster 2005-08
Porsche 987C.1 Cayman 2006-08

This product replaces:

98737502304, 98737502305, 98637502307 

Click 'Zoom in' for large parts diagram.
Diagram Ref No 2.

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3609309871

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Engine mount with HD polyurethane bush



Fits:
Porsche 986 Boxster 1997-04
Porsche 987.1 Boxster 2005-08
Porsche 987C.1 Cayman 2006-08

This product replaces:

98737502304, 98737502305, 98637502307 

Click 'Zoom in' for large parts diagram.
Diagram Ref No 2.

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

3609309872

The product you are viewing cross references to these numbers

Engine mount.



Fits:
Porsche 986 Boxster 1997-04
Porsche 987.1 Boxster 2005-08
Porsche 987C.1 Cayman 2006-08

This product supersedes Porsche's old part numbers:
- 98737502304

Click 'Zoom in' for large parts diagram.
Diagram Ref No 2.

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

98737502305

The product you are viewing cross references to these numbers

Engine mount Part number 987.375.023.05 (often written 98737502305) is the centre engine mount / mount insulator used on mid-engine Porsche Boxster/Cayman models, commonly fitted to late 986 and 987 Boxster / early 987 Cayman applications. The item is offered both as the complete mount and bracket assembly and as a replacement bushing/insulator that must be pressed into the aluminium bracket.

Position: center engine mount (the central mount that locates the engine fore/aft and resists torque). 

Fits:

• Porsche Boxster 986 2.5L 1997-99
• Porsche Boxster 986 2.7L 1999-02
• Porsche Boxster S 986 3.2L 1999-02
• Porsche Boxster 986 2.7L 2003-04
• Porsche Boxster S 986 3.2L 2003-04
• Porsche Boxster 987 2.7L 2005 -08/08
• Porsche Boxster 987 S 3.2/3.4L 2005-08/08
• Porsche Cayman 2.7L 987C 2006-08
• Porsche Cayman S 3.4L 987C 2005-08  

Replace the part when it has lost its ability to control engine movement and damp vibration. Typical triggers to replace the centre mount include: 

• Hard clunk or bang on acceleration, deceleration or gear changes (engine shifting against chassis).
• Excessive vibration into the cabin, especially at idle or specific RPM bands.
• Visible damage — torn, separated rubber, oil-soaked or collapsed mount/bushing, or corrosion of mating faces. 

Common issues & failure causes

• Rubber deterioration: age, heat cycling and mechanical fatigue cause the rubber to harden, crack or de-bond from the metal, reducing isolation and allowing increased engine movement.
• Fluid contamination: oil or coolant leaks accelerate rubber breakdown (softening or swelling), commonly seen on older engines where leaks occur.
• Mechanical shock / abuse: repeated hard launches, aggressive shifting or collisions can cause sudden mount failure or promote early fatigue.
• Bracket wear / corrosion: the bushing may be fine, but the aluminium bracket can crack, corrode, or the bushing may need pressing into a worn bracket — which is why some techs prefer replacing the full assembly. 

This product supersedes Porsche's old part numbers:
- 98737502304

Click 'Zoom in' for large parts diagram.
Diagram Ref No 2.

Related reference numbers
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98737502305

The product you are viewing cross references to these numbers

Engine suspension bracket.


Fits:
Porsche 981 Boxster 2012-16
Porsche 981 Boxster Spyder 2016
Porsche 981C Cyaman 2014-16
Porsche 981C Cayman GT4 2016

Click 'Zoom in' for large part diagram.
Diagram ref no 1

Related reference numbers
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9A137504602

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Engine Suspension Bracket.

 
Fits:
Porsche 987 Boxster / S 2009-12
Porsche 987C Cayman / S 2009-12

Diagram ref no 2

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9A137502322

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Engine mount
Keep your vehicle running smoothly with this high-quality engine mount designed to match OEM standards for durability and performance. The engine mount (also known as a motor mount) plays a vital role in supporting your engine and isolating vibration from the chassis.

Fits:
Porsche Boxster 987 MKII 2.9L 2009-2012
Porsche Boxster S 987 MKII 3.4L 2009-2012
Porsche Cayman 2.9L 987C MKII 2009-12
Porsche Cayman S / R 3.4L 987C MKII 2009-12

Diagram ref no 1

Product Overview
This precision-engineered engine mount securely holds your engine in place while absorbing vibrations and road shocks. Manufactured from high-grade steel and vibration-resistant rubber or hydraulic components, it ensures long service life even under demanding driving conditions.

Key Features & Benefits

• OEM-equivalent performance – Direct replacement for part number 9A137502322.
  
• Enhanced vibration isolation – Reduces cabin noise and harshness for a smoother, quieter drive.
  
• Durable construction – Corrosion-resistant housing with high-quality bonding for long life.
  
• Precision fit – Matches factory specifications for fast, trouble-free installation.
  
• Improves ride quality and handling – Maintains correct engine position and drivetrain geometry.
  
• Prevents costly damage – Reduces stress on exhaust systems, hoses, and electrical wiring.

Symptoms of a Worn or Failing Engine Mount - If your engine mount is worn, you may notice:

• Excessive vibration or shaking at idle or during acceleration.
  
• Clunking or knocking noises when shifting gears or accelerating.
  
• Engine movement or rocking under load.
  
• Visible cracks or leaks in the rubber or hydraulic fluid.
  
• A sagging or misaligned engine in the bay.

These symptoms suggest it’s time for replacement before further damage occurs.

Common Causes of Failure - Engine mounts naturally wear out due to:

• Age and fatigue (rubber hardens, cracks, or loses elasticity).
  
• Oil or coolant leaks that deteriorate the rubber.
  
• Harsh driving or torque loads from aggressive acceleration.
  
• Incorrect installation or over-tightened fasteners.
  
• Corrosion on the mounting brackets or bolts.

Why Replace an Engine Mount? - Replacing your mount restores stability, comfort, and safety.

• Prevents engine movement that can damage hoses or wiring.
  
• Reduces vibration and noise inside the cabin.
• Maintains alignment of the drivetrain and transmission.
• Avoids premature wear on suspension and steering components.
• Restores factory ride comfort and performance feel.

 

Quality You Can Trust
All mounts are manufactured to OEM or higher standards, tested for vibration resistance, and backed by our quality guarantee. Replace both left and right mounts if necessary for balanced support and maximum longevity.

Related reference numbers
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9A137502322

The product you are viewing cross references to these numbers

Our polyurethane bushes are ideal replacements for worn or damaged parts. Engine mount bushes are particularly prone to cracking of the rubber because of a large amount of voiding in the material to allow for excessive movement. For an insert only please use PFR57-521BLK.

OEM Part Number: 98737502305
OEM Part Number: 9A137502322

Fits:
Porsche Boxster 986 (1997-2004)
Porsche Boxster 987 (2005-2009)
Porsche Cayman 987C (2005 - 2009)

up to 2009 with engine codes M9625, M9626, M9720, M9721 & M9722

DIAGRAM REFERENCE: 20

Related reference numbers
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PFR57-520BLK

The product you are viewing cross references to these numbers

Powerflex Front engine mount bush.



PFR57-820 fits all models from 2009 onwards. For any models before this, please use PFR57-520.

OEM Part Number: 9A137504601
OEM Part Number: 9A137502322

Fits:
Porsche 987.2 Boxster 2009-2012
Porsche 987C.2 Cayman 2009-2012
Porsche 981 Boxster 2012-16
Porsche 981C Cayman 2014-2016

Click 'Zoom in' for large parts diagram.
Diagram ref no 20

Powerflex. Replacing your car rubber suspension bushes with Polyurethane Suspension Bushes will give you:

- Better road holding
- Constant steering geometry
- Increased tyre life
- More responsive steering
- Longer service life of suspension components

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

PFR57-820

The product you are viewing cross references to these numbers

Powerflex Black Series Front engine mount bush.



PFR57-820BLK fits all models from 2009 onwards. For any models before this, please use PFR57-520BLK.

OEM Part Number: 9A137504601
OEM Part Number: 9A137502322

Fits:
Porsche 987.2 Boxster 2009-2012
Porsche 987C.2 Cayman 2009-2012
Porsche 981 Boxster 2012-16
Porsche 981C Cayman 2014-2016

Click 'Zoom in' for large parts diagram.
Diagram ref no 20

Powerflex Black Series- Designed for the Track - Ready to Race - Engineered to be the best.

Powerflex Black Series bushes are manufactured using a 95 Shore A compound to provide maximum control of chassis geometry. This compound can be up to 80% more resistant to load than standard rubber and 25% stiffer than our purple performance material.

If your requirements are purely for the ultimate in handling and chassis performance then Powerflex Black Series are unique, offering the most precise and accurate alignment for your chassis.

Replacing your car rubber suspension bushes with Polyurethane Suspension Bushes will give you:

- Better road holding
- Constant steering geometry
- Increased tyre life
- More responsive steering
- Longer service life of suspension components.

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

PFR57-820BLK

The product you are viewing cross references to these numbers

Powerflex Front engine mount insert.



PFR57-821 fits all models from 2009 onwards. For any models before this, please use PFR57-521.

OEM Part Number: 9A137502322
OEM Part Number: 9A137504601

Fits:
Porsche 987.2 Boxster 2009-2012
Porsche 987C.2 Cayman 2009-2012
Porsche 981 Boxster 2012-16
Porsche 981C Cayman 2014-2016

Click 'Zoom in' for large parts diagram.
Diagram ref no 20

Powerflex. Replacing your car rubber suspension bushes with Polyurethane Suspension Bushes will give you:

- Better road holding
- Constant steering geometry
- Increased tyre life
- More responsive steering
- Longer service life of suspension components

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

PFR57-821

The product you are viewing cross references to these numbers