Engine Mounts

Engine Mount HD RS Style, 65A Shore Rating.
Upgrade your Porsche’s performance and stability with this RS-style Heavy-Duty Engine Mount. Designed as a direct replacement for standard mounts, it features a 65A Shore-rated rubber compound that delivers the perfect balance between comfort and precision.
Sold Each.
x2 Required Per Car.

Fits:

• Porsche 964 (911) C2 1989-93
• Porsche 964 (911) C4 1989-93
• Porsche 964 (911) RS 3.6L 1991-93
• Porsche 964 (911) RS 3.8L 1991-93
• Porsche 964 (911) TURBO 3.3L 1991-93
• Porsche 964 (911) TURBO 3.6L 1991-93
• Porsche 993 (911) C2 1994-97
• Porsche 993 (911) C4 1994-97
• Porsche 993 (911) RS 1994-97
• Porsche 993 (911) C2S 1994-97
• Porsche 993 (911) C4S 1994-97
• Porsche 993 (911) TURBO 1994-96
• Porsche 993 (911) GT2 1994-97
• Porsche 993 (911) TURBO S 1994-97

Diagram Ref No 7A

What This Product Does:

• This is a high-density (HD) rubber engine mount in the RS / sport style, intended as an upgraded or stronger replacement to the standard mounts offered on Porsche 964 / 993 models.
• The “65A Shore rating” refers to the hardness (stiffness) of the rubber material. A Shore A of 65 gives a balance: firmer than the softest mounts, but not excessively rigid, aiming to deliver improved engine control without too much harshness.
• It is often used as a pair (one on each side of the engine) to replace worn or softer factory mounts.
• The RS style mount replaces or upgrades from the factory hydraulic or softer mounts.
• In practice, what it does: it helps secure the engine more rigidly to the chassis, reducing unwanted engine movement (twist, yaw, vibration) under load (acceleration, cornering, braking). It helps maintain drivetrain geometry, gives crisper throttle response, and improves shift feel.
  
  

Symptoms / Signs Of A Failing Or Worn Engine Mount:

• Excessive Engine Movement / “Engine Rocking” - The engine may shift or rock under throttle or when revving, particularly during hard acceleration, deceleration, or rapid load change.
  
• Clunks or Thuds / Transmission “Bump” During Engagement - When shifting gears, especially from neutral into drive or reverse, or when applying throttle from idle, the drivetrain may “bump” or thud due to slack from the worn mount.
  
• Misalignment / Drivetrain Strain - Because mounts help maintain alignment between engine, gearbox, and driveshafts, a failing mount can cause misalignment, leading to extra stress on coupling joints, CVs, or mount brackets.
  
• Increased Vibration or Harshness - You may feel more vibration through the cabin, floor, or pedals, especially under load.
  
• Noise - Metallic rattles or clunks if the engine is loose enough to hit against brackets or the chassis.
  
• Rubber Deterioration / Visible Damage - Cracks, splits, or separation in the rubber portion of the mount.
  
  

Why This Upgrade Matters:

• Upgrading to the RS-Style Engine Mounts (65A Shore Rating) transforms how your Porsche feels on the road. Standard factory mounts are designed for comfort, but over time they soften and allow excessive engine movement, which dulls throttle response and gear changes. The RS-spec design uses a firmer 65A rubber compound, originally developed for Porsche’s Rennsport (RS) models, to deliver sharper, more connected driving dynamics without adding harshness.
  
• With these mounts installed, your engine and gearbox stay properly aligned, improving stability under acceleration, cornering, and braking. You’ll experience crisper shifting, reduced vibration, and improved handling precision, especially during spirited or track driving.

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

96437504381

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Engine Mount HD RS Style, 75A Shore Rating.

Upgrade your Porsche’s powertrain stability with the HD RS Style Engine Mounts — precision-engineered replacements inspired by the legendary 964 and 993.
These high-performance mounts use 75A Shore durometer rubber, offering a significant increase in stiffness over standard or hydraulic mounts.
The result reduced drivetrain movement, crisper throttle and shift response, and more consistent handling under load.
Sold Each.
x2 Required Per Car.

Fits:

• Porsche 964 (911) C2 1989-93
  
• Porsche 964 (911) C4 1989-93 
• Porsche 964 (911) RS 3.6L 1991-93 
• Porsche 964 (911) RS 3.8L 1991-93 
• Porsche 964 (911) TURBO 3.3L 1991-93
  
• Porsche 964 (911) TURBO 3.6L 1991-93 
• Porsche 993 (911) C2 1994-97
  
• Porsche 993 (911) C4 1994-97 
• Porsche 993 (911) RS 1994-97
  
• Porsche 993 (911) C2S 1994-97
  
• Porsche 993 (911) C4S 1994-97
  
• Porsche 993 (911) TURBO 1994-96
  
• Porsche 993 (911) GT2 1994-97 
• Porsche 993 (911) TURBO S 1994-97
  
  

Diagram Ref No 7A

What This Product Does:

• Support the engine / transmission assembly, holding it in position relative to the chassis.
  
• Isolate vibration and noise, so that engine shake doesn’t overly transmit into the cabin.
  
• Control motion under load, resisting twisting, torque, or movement during acceleration / braking / cornering.

Symptoms Of Failing / Weak Engine Mounts:

• Excess engine movement or shift under acceleration or deceleration
  
• Clunks, knocks, or bangs when shifting or when the engine “settles”
  
• Increased vibration, especially at idle or low RPM in the cabin
  
• Misalignment of driveline (axles, driveshaft, transmission) under load
• Premature wear on exhaust, wiring, hoses — anything connected to the engine that gets stressed when it moves

Why Upgrade To HD RS 75A Mounts:

• Sharper Throttle & Shift Response - Stiffer rubber minimizes drivetrain lag and flex.
• Reduced Engine Twist - Keeps drivetrain geometry stable under load.
• Improved Handling Balance - Less movement means more predictable chassis behavior.
• Enhanced Durability - 75A compound resists collapse and fatigue over time.
• Track-Tested Feedback - Ideal for RS conversions, spirited driving, or track use.

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

96437504381

The product you are viewing cross references to these numbers

Engine Mount Kit. HD RS version.
Replaces factory hydraulic mounts. 1 kit with 2 mounts, hardware not included. This set has a rubber Shore rating of 75 and can be used as an upgrade for standard 964/993 for performance road and track use



Fits:
Porsche 964 Carrera
Porsche 993 Carrera

Click 'Zoom in' for large parts diagram.
Diagram Ref No 7A.

Related reference numbers
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96437504381KIT

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Engine mount nut. M12 x 1.5



Fits:
Porsche 993 Carrera

Porsche 996 Carrera
Porsche 996 TURBO / GT2 / GT3

Porsche 997.1 Carrera
Porsche 997.1 TURBO / GT2 / GT3

Porsche 997.2 TURBO / GT2 / GT3

Click 'Zoom in' for large parts diagram.
Diagram ref no 4

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

99908421501

The product you are viewing cross references to these numbers

Engine Mount Panel.

Fits:
Porsche 964 1989 - 1994
Porsche 993 1994 - 1997

Diagram ref no 8

Related reference numbers
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99350104

The product you are viewing cross references to these numbers

Engine stand for engine mount.



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

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Rennline Engine Carrier Reinforcement Gusset Kit.



Fits:
Porsche 964 1989-94
Porsche 993 1995-98 All Except -92 Turbos

One of the only weak points on the 964 and 993 chassis is the engine carrier. When these models are tracked, or are fitted with stiffer than stock engine mounts, the engine carrier should be reinforced. If it is not, the carrier is known to bend, crack, or even break cleanly away from an engine mount in response to increased vibration and stress. The Porsche factory was aware of this problem and equipped its race cars with a reinforced engine carrier. Rennline now exclusively offers an engine mount reinforcement gusset kit that can be welded to the engine carrier by your workshop.

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

M04

The product you are viewing cross references to these numbers

Rennline Tubular Engine Carrier.



Fits:
Porsche 964
Porsche 993

One of the only weak points on the 964 and 993 chassis is the engine carrier. When these models are tracked, or are fitted with stiffer than stock engine mounts, the engine carrier is known to bend, crack, or even break cleanly away from an engine mount in response to increased vibration and stress. The Porsche factory was aware of this problem and equipped its race cars with a reinforced engine carrier. Rennline now offers a tube frame replacement for your factory engine carrier that is proven to be much stronger, and can withhold the stresses of any track day, while offering a 1.4lb weight savings over a gusseted factory carrier. All parts manufactured on cnc equipment and meticulously tig welded, finished with a matte black powdercoat.

Related reference numbers
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M19

The product you are viewing cross references to these numbers