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Engine Mounts

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3609309625KIT
Product Information
Product Information
Performance engine mounts (PAIR). Included two M12 x 1.75 Nuts
Includes separate inserts for varying densities

Includes all 3 inserts for varying densities
Shore ratings 65A Street
Shore ratings 75A Fast Road (including in engine mounts)
Shore ratings 85A Track

Fits:
Porsche 964 C2 / C4 / RS / Turbo
Porsche 993 C2 / C4 / RS / Turbo
Porsche 996 C2, C4, C4S, Turbo, GT2, GT3
Porsche 997 C2, C2s, C4, C4s, Turbo, GT2, GT3

Replacing your factory engine mounts with these performance semi-solid mounts will dramatically decrease engine movement which then will result in better acceleration and handling of your Porsche.

CNC machined mounts with PU bushes are absolute must have for any car on track or on the street. Very easy to replace by experienced DIYers.

For 911 & Porsche world article / fitment guide pdf please CLICK HERE

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Related, superseded, cross reference or alternative numbers for comparison.

3609309625KIT
993375049
99337504908
96437504381
99337504909
96537504900
96537505000
99637504991
99737504908
99737504907
997375049
996375049
3609309624
3609309625
3609309624

The product you are viewing cross references to these numbers
964MOUNTKIT
Product Information
Product Information

Fitting are for one engine mount

Engine mount fitting kit incl. :  
4x Seat 90130531100
2x Bolt 90008214402
4x Washer 99902507401
4x Washer 99902513402

porsche

Fits:
Porsche 964 Carrera RS 1989-94
Porsche 993 Carrera RS 1995-98

Click 'Zoom in' for large parts diagram.
Diagram Ref No 13, 14, 15 and 16.

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Related, superseded, cross reference or alternative numbers for comparison.

964MOUNTKIT
96437504381
90130531100
90008203002
99902507402
99902513402
99902507401

The product you are viewing cross references to these numbers
99337504909/1KIT.2
Product Information
Product Information
Engine mount kit
The OE Match Engine Mount Kit is a complete replacement solution for Porsche 993 Coupe and Targa models, including Carrera 2, Carrera 4 (non-Cabrio), and Turbo variants. It includes two OE Match engine mounts along with OE Match bolts and genuine Porsche  locknuts for proper installation.
SET OF 2,  with bolts, washers and nuts

Fits:
Porsche 993 (911) C2 / C2S 1994 - 1997 not Cabrio
Porsche 993 (911) C4 / C4S 1994 - 1997 not Cabrio
Porsche 993 (911) Turbo 1994 - 1996

Diagram ref no 21, 22 and 10

This complete kit is designed to replace both engine mounts and associated fixing hardware in one package, ensuring a correct and reliable installation.

The kit includes:
  •  2 × OE Match engine mounts (99337504909)
  •  4 × OE Match bolts (90037805501)
  •  2 × Genuine Porsche locknuts (99908421501)

The engine mounts are manufactured to OE specifications, providing the correct balance between support and vibration damping. Built using high-quality elastomer and metal construction, they are designed to withstand heat, load, and long-term use while maintaining consistent performance.

These mounts are suitable for both left and right positions (two required per vehicle) and replace earlier part numbers including 99337504905 and 99337504907.

Including genuine Porsche bolts and locknuts ensures proper torque retention and secure mounting - critical for maintaining drivetrain stability and avoiding issues caused by reused or stretched hardware.

This kit secures the engine to the chassis while isolating vibration and controlling engine movement during driving. It restores smooth operation, reduces noise, and improves overall drivetrain stability.

Replacing both mounts and fixings together ensures consistent performance and eliminates common causes of vibration and misalignment.

Function
  Supports and positions the engine within the chassis
  Absorbs vibration and reduces cabin noise
  Maintains correct drivetrain alignment
  Ensures secure installation with OE-spec hardware

This kit is essential for preserving both performance and comfort in classic Porsche models.

Over time, engine mounts degrade due to heat, load, and material fatigue. This can lead to excessive vibration, engine movement, and reduced driving comfort. Replacing both mounts along with new genuine hardware ensures proper installation, restores smooth engine operation, and protects surrounding drivetrain components from unnecessary stress.

When to replace
  Increased vibration felt in cabin or steering
  Clunking noises during acceleration or gear changes
  Visible wear or deterioration of mounts
  Engine movement or misalignment
  During engine or gearbox service



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

99337504909
99337504909
99337504905
99337504907

The product you are viewing cross references to these numbers
99337504909/1KIT.1
Product Information
Product Information
Engine mount kit
The OE Match Engine Mount Kit is a complete replacement solution for Porsche 993 Carrera 4 / 4S Cabriolet models. It includes two OE Match engine mounts along with genuine Porsche bolts, washers, and locknuts required for secure installation.
SET OF 2,  with bolts, washers and nuts

Fits:
Porsche 993 (911) C4 / C4S 1994 - 1997 Cabrio

Diagram ref no 7, 8, 9 and 10

This comprehensive kit is designed to replace both engine mounts and associated hardware in one complete package.

Kit includes:
    2 × OE Match engine mounts (99337504909)
    4 × Genuine Porsche bolts (90007413402)
    4 × Genuine Porsche washers (96437511001)
    2 × Genuine Porsche locknuts (99908421501)

The mounts are manufactured to OE specifications, ensuring precise fitment and proper vibration damping. These hydraulic-style mounts are engineered to support the engine while absorbing movement and reducing drivetrain vibration.

Including genuine Porsche fixings ensures correct torque, alignment, and long-term reliability - eliminating the risks associated with reusing old or stretched hardware.

This kit stabilises the engine within the chassis while isolating vibration and controlling engine movement. It restores smooth operation, improves driving comfort, and ensures proper drivetrain alignment.

Replacing both mounts and hardware together provides a complete refresh of the engine mounting system, eliminating common causes of vibration and noise. Engine mounts are specifically designed to reduce drivetrain vibration and maintain stability

Function
  Supports and secures the engine in position
  Absorbs vibration and reduces cabin noise
  Maintains proper drivetrain alignment
  Ensures secure installation with OE-spec hardware

This kit is essential for maintaining both performance and refinement in classic Porsche models.

Over time, engine mounts degrade due to heat, load, and fluid wear, leading to increased vibration and engine movement. Worn mounts can negatively affect handling, comfort, and even stress surrounding components. Replacing both mounts together with new genuine hardware ensures proper installation, restores factory-level smoothness, and protects the drivetrain from further wear.

When to replace
  Increased vibration in cabin or steering
  Clunking during acceleration or gear changes
  Visible wear or fluid leakage from mounts
  Engine sitting lower or misaligned
  During engine or gearbox service



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

99337504909
99337504909
99337504905
99337504907

The product you are viewing cross references to these numbers
DISPLAYING 1 to 4 (of 33 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.

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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