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Engine Mounts

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DISPLAYING 17 to 22 (of 22 products)
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99337504908/2
Product Information
Product Information
Engine Mount. Part Number:  99337504908   — this is a hydro-elastic (fluid-filled) engine mount, superseding older numbers like  99337504905, and 99337504906 .  Fitment is side-specific (left or right), two are required per vehicle.

sachs

Fits:
Porsche 996 C2 3.4L 1997-08/01Porsche 996 C4 3.4L 1997-08/01Porsche 996 C2 3.6L 09/01-2005Porsche 996 C4 3.6L 09/01-2005Porsche 996 C4S 3.6L 09/01-2005

Why Replace It, Engine mounts are crucial for:

Locating and supporting the engineAbsorbing vibration and engine torque under acceleration, braking, and corneringWhen this mount deteriorates or fails, you can expect, Increased vibration transmitted to the cabin, steering, or pedalsClunks, bangs, or loud noises during acceleration, deceleration, or gear changes from engine movement against the chassisVisual signs such as leaking black fluid from the mount, sagging of tailpipes (due to dropped mounting), or visible damage to rubber or metal components 


Common Failure Causes

Age-related rubber degradation: over time, rubber hardens, cracks or de-bonds, causing loss of damping and allowing engine movementFluid leakage (hydraulic version): loss of damping fluid due to seal failure accelerates failureFluid contamination: oil, coolant, or other contaminants degrade the rubber materialVehicle abuse or stress: aggressive driving, hard launches, or previous accidents can warp or break mountsWorn or cracked brackets: even if the rubber is intact, the aluminium bracket can be damaged or corroded, reducing effectiveness 


(the older part number was 99337504905, 99337504906).

Click 'Zoom in' for large parts diagram.
Diagram ref no 2.



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Related, superseded, cross reference or alternative numbers for comparison.

99337504908
314094410252
99337504908
99337504906
4353901

The product you are viewing cross references to these numbers
Special Order item
99637504991
Product Information
Product Information
Engine Mount.

porsche

Fits:
Porsche 996 GT3 1999 -05

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

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Related, superseded, cross reference or alternative numbers for comparison.

99637504991
99637504990
99637504991

The product you are viewing cross references to these numbers
6898
Product Information
Product Information
Engine stand for engine mount.

nordschleife

Fits:
Porsche 356
Porsche 911 912 F/G
Porsche 930
Porsche 914
Porsche 964
Porsche 993
Porsche 996 turbo/GT2/GT3
Porsche 997 turbo/GT2/GT3
The pickup tube is D=60mm in outer diameter

Reference numbers:
00072120100, 000.721.201.00, 000 721 201 00, P201

For the revision of your Porsche engine, we offer this engine mount. The flange surface with your cantilevers to the mounting axis allows a secure and at the same time easily accessible attachment of the engine to a rolling engine stand. Alternatively, you can use the engine mount to mount the engine to a workbench using a bearing block. We have the engine stands for all classic Porsches with and without a mounting stand in our program.

Notice: The colour of the part may differ from the colour shown.

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

6898
6898

The product you are viewing cross references to these numbers
Special Order item
90037825501
Product Information
Product Information
Hex head bolt M10x70 for engine mount. 

porsche

Fits:
Porsche 996 turbo - 2001 to 2005

Click 'Zoom in' for large parts diagram.
Diagram ref no 6



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

90037825501
90037806509
90037825501

The product you are viewing cross references to these numbers
DSM-EMGMT
Product Information
Product Information
Demon Speed Motorsports is proud to present the RSR-styled Engine Mount Carrier, specifically designed for 996/997 Turbo, GT3, and Cup cars.

demonspeed

Fits:
Porsche 996 GT3 Cup Car 
Porsche 997 GT3 Cup Car 
Porsche 996 Turbo/GT2 2001-05
Porsche 996 GT3/GT3 RS 1999-05
Porsche 997.1 Turbo 2007-09
Porsche 997 GT2/GT2 RS 2007-12
Porsche 997 GT3/GT3 RS 2007-09

Stronger than the original, this engine plate is crafted from stainless steel with high-quality 7075 aluminum bolt-on mountings, making it a superior alternative to the factory-stamped steel plate prone to fatigue and failure.

Click 'Zoom in' for large parts diagram.
Diagram Ref No 1.

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

DSM-EMGMT
99637501300
99637501301
DSM-EMTL
DSM-EMTR
3609309625KIT
M18
624
M08

The product you are viewing cross references to these numbers
Special Order item
99921811001
Product Information
Product Information
Stud - M10 x 102 mm - which threads into the front of the block and locates the engine mount carrier. 

Four required per vehicle. 


porsche

Fits:
Porsche 996 Carrera 2 / 4 / 4S 1998-05
Porsche 997.1 Carrera 2 / 2S / 4 / 4S 2005-08



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

99921811001
99921811009

The product you are viewing cross references to these numbers
DISPLAYING 17 to 22 (of 22 products)
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About Engine Mounts

Replacement Engine Mounts – Stability, Comfort, and Performance for Porsche Models

Engine mounts are the unsung heroes of your Porsche’s drivetrain, securing the engine to the chassis while absorbing vibration and maintaining precise alignment. Over time, these components can degrade from constant heat, torque, and road stress — affecting ride quality, handling, and drivetrain performance.

At Design911, we supply a wide selection of precision-engineered replacement engine mounts designed to the highest performance standards. Manufactured from high-grade rubber, polyurethane, or reinforced composite materials, these mounts provide the perfect balance of vibration isolation and structural support.

Whether you’re restoring a classic air-cooled model or maintaining a modern 911, manufacturer-quality mounts ensure smooth operation, improved comfort, and precise drivetrain alignment under all conditions.

What Do Engine Mounts Do?

Engine mounts secure the engine and transmission to the vehicle’s chassis, minimising movement while isolating vibrations that would otherwise transfer into the cabin.

Core Functions:

  • Securely position the engine and transmission within the chassis.
  • Absorb vibration and torque movement, improving comfort and handling.
  • Maintain drivetrain alignment for optimal power transfer.
  • Reduce stress on components such as hoses, wiring, and exhaust connections.

Well-fitted engine mounts preserve your Porsche’s distinctive refinement and handling precision, especially under high load or spirited driving.

Why Do Engine Mounts Fail?

Due to constant exposure to torque, heat, and vibration, engine mounts naturally degrade over time. Worn or broken mounts can lead to excessive engine movement, clunking noises, and vibration inside the cabin — symptoms that should never be ignored.

Common Causes of Engine Mount Failure Include:

  • Material fatigue from age or repeated heat cycling.
  • Oil contamination, softening rubber or polymer components.
  • Excessive engine torque or vibration, especially on tuned or high-mileage engines.
  • Corrosion or cracking in metal brackets or hardware.
  • Improper installation leading to uneven stress and premature wear.

Failing mounts compromise performance and comfort, causing drivetrain misalignment and potential damage to surrounding components.

Why Replace with Precision-Engineered Engine Mounts?

Upgrading to high-quality replacement engine mounts restores the stability, refinement, and handling balance your Porsche was designed for. Precision-engineered mounts ensure reliable load distribution, vibration damping, and improved driving comfort.

Key Benefits:

  • Restores drivetrain stability and precise engine positioning.
  • Reduces vibration and harshness, improving cabin comfort.
  • Enhances throttle response by limiting engine movement.
  • Protects critical components from stress and misalignment.
  • Available in rubber or performance polyurethane for tailored ride feel.
  • Perfect fitment across Porsche models — air-cooled, turbocharged, or hybrid.

Whether you’re maintaining daily drivability or preparing for track use, replacement mounts deliver the durability and control your Porsche deserves.

Highlights:

  • Precision-engineered replacement engine mounts for all Porsche models.
  • High-grade rubber, polyurethane, or reinforced construction.
  • Improves handling, comfort, and vibration isolation.
  • Direct-fit compatibility for easy installation and perfect alignment.
  • Ideal for rebuilds, performance upgrades, or preventive maintenance.
  • Restores driving dynamics and comfort in classic and modern Porsches.


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How to Identify and Replace Worn Engine Top Mounts

In this informative session, Lawrence Todd from Design 911 explains all the essential details about engine mounts—what they do, how to recognise signs of deterioration, and when it's time for a replacement. Discover the various types of engine mounts available for Porsche models and how upgrading can improve your vehicle’s performance.
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