Gearbox Mounts

Powerflex Heritage Collection Replacement Engine /Gearbox Mount Bush.



Set of 2 bushes which will fit 2 Engine mounts

Fits inside the Mounts of:
Porsche 911 1965-69 Engine Mount
Porsche 911 1970-86 Engine & 915 Gearbox Mount
Porsche 911 1986-89 Engine Mount
Porsche 930 1975-77 Engine Mount
Porsche 930 1978-89 Engine Mount
(not CS, not Cabrio)

Please note the price does not include mounts

Fits to No.8 on the diagram


Powerflex Heritage Collection. For Modern Day Classics.

A range of bushes engineered for the road to compliment your classic car.

POWERFLEX Heritage Collection bushes are manufactured using modern day materials with properties biased for the road. These dark grey coloured bushes will improve any collector's car, whilst retaining the same standard appearance of a rubber bush.

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Related, superseded, cross reference or alternative numbers for comparison.

PFR57-415H

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SuperPro Replacement Engine /Gearbox Mount Bush.
SET OF 4 bushes



Please note the price does not include mounts. You are buying only the bushes

Fits inside the Mounts of:
Porsche 911 1965-69 Engine Mount
Porsche 911 1970-86 Engine & 915 Gearbox Mount
Porsche 911 1986-89 Engine Mount
Porsche 930 1975-77 Engine Mount
Porsche 930 1978-89 Engine Mount
(not CS, not Cabrio)

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

Click 'Zoom in' for large parts diagram.
Fits to No. 8 on the diagram

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SPF1375K

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Engine / gearbox mounts - sport version stiffer than standard

New sport version with shifter rubber mounts, great for trackdays and high speed driving. Fits engine mounts OR transmission mounts ,shifting for more smoother and exact shifting.

You will need 2 for the engine 3.0L or 3.2L
You will need 2 for the G15 transmission not G50 Gearbox

Fits:
Porsche 911 1978-89
Porsche 911 Cabrio 1978-89

Diagram Ref No 8

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91137504306

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Engine / gearbox mounts  (SET OF 2)  HD 85A shore rating sport bushes



New sport version with shifter rubber mounts, great for track days and high speed driving. Fits engine mounts OR transmission mounts ,shifting for more smoother and exact shifting.

You will need 2 for the engine 3.0L or 3.2L
You will need 2 for the G15 transmission not G50 Gearbox

Fits:
Porsche 911 1976-86
Porsche 911 Cabrio 1978-86

Click picture for large parts diagram.
Diagram Ref No 8.

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

3609309111

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Powerflex Replacement Engine /Gearbox Mount Bush.



Set of 2 bushes which will fit 2 Engine mounts

Fits inside the Mounts of:
Porsche 911 1965-69 Engine Mount
Porsche 911 1970-86 Engine & 915 Gearbox Mount
Porsche 911 1986-89 Engine Mount
Porsche 930 1975-77 Engine Mount
Porsche 930 1978-89 Engine Mount
(not CS, not Cabrio)

Please note the price does not include mounts

Fits to No.8 on the diagram

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.

PFR57-415

The product you are viewing cross references to these numbers

Powerflex Black Series Replacement Engine/Gearbox Mount Bush.



SET OF 2 bushes which will fit 2 Engine mounts

Fits inside the Mounts of:
Porsche 911 1965-69 Engine Mount
Porsche 911 1970-86 Engine & 915 Gearbox Mount
Porsche 911 1986-89 Engine Mount
Porsche 930 1975-77 Engine Mount
Porsche 930 1978-89 Engine Mount
(not CS, not Cabrio)

Fits to No. 8 on the diagram


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 responsitive steering
- Longer service life of suspension components

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

PFR57-415BLK

The product you are viewing cross references to these numbers

Gearbox carrier.

Fits:
Porsche 911 1975-86
4 SPEED turbo gearbox

Diagram Ref No 1A.

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93037503100

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Powerflex Gearbox mount carrier bush.
Sold as a complete set for one gearbox mount

OEM Part Number: 90137503100 



Fits:
Porsche 911 1965-89
Porsche 912 1965-69

Made in our Dark Grey 80A durometer material to give the appearance of rubber but with the performance and longevity of polyurethane, reducing bush deflection by an impressive 50%. A small increase in NVH, usually at idle, should be expected when stiffening the connecting mount between the transmission and chassis. The harder the material used, the greater the NVH transmitted.

Click 'Zoom in' for large parts diagram.
Diagram ref no 21

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.

PFR57-414

The product you are viewing cross references to these numbers

Powerflex Powerflex Black Series Gearbox carrier mount bush.
Sold as a complete set for one gearbox mount

OEM Part Number: 90137503100 



Fits:
Porsche 911 1965-89
Porsche 912 1965-69

Made in our Dark Grey 80A durometer material to give the appearance of rubber but with the performance and longevity of polyurethane, reducing bush deflection by an impressive 50%. A small increase in NVH, usually at idle, should be expected when stiffening the connecting mount between the transmission and chassis. The harder the material used, the greater the NVH transmitted.

Click 'Zoom in' for large parts diagram.
Diagram ref no 21

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.

PFR57-414BLK

The product you are viewing cross references to these numbers

Powerflex Gearbox mount carrier bush.
Sold as a complete set for one gearbox mount

OEM Part Number: 90137503100 



Fits:
Porsche 911 1965-89
Porsche 912 1965-69

Made in our Dark Grey 80A durometer material to give the appearance of rubber but with the performance and longevity of polyurethane, reducing bush deflection by an impressive 50%. A small increase in NVH, usually at idle, should be expected when stiffening the connecting mount between the transmission and chassis. The harder the material used, the greater the NVH transmitted.

Click 'Zoom in' for large parts diagram.
Diagram ref no 21

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.

PFR57-414H

The product you are viewing cross references to these numbers

Gearbox mount cup washer.
Sold each

Fits:
Porsche 911 1965-89
Porsche 911 (930) Turbo 1975-89
Porsche 964 CARRERA RS
Porsche 993 CARRERA RS

Diagram Ref No 6

Gearbox mount cup washer. 
Fits above and below the engine/transmission mounts.



Fits:
Porsche 911 1965-89
Porsche 911 (930) Turbo 1975-89
Porsche 964 CARRERA RS
Porsche 993 CARRERA RS

Click 'Zoom in' for large parts diagram.
Diagram Ref No 6

Price shown is for each.

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90130531100PRM

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Gearbox Mounts Hexagon-Head Bolt Nut. M 8.



Fits:
Porsche 911/912 1965-89
Porsche 911 (930) Turbo 1975-89

Click 'Zoom in' for large parts diagram.
Diagram Ref No 9

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90007606402

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Gearbox Mounts Hexagon-Head Bolt. M 8 x 35.

Fits:
Porsche 911/912 1965-89
Porsche 911 (930) Turbo 1975-89

Diagram Ref No 7

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90007503203

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HD Semi-Solid Engine Mount Set.

Enhance drivetrain precision and performance with the HD Semi-Solid Engine / Transmission Mount Set, designed specifically for Porsche 911 and 912 models
These heavy-duty mounts replace the factory rubber units with a semi-solid, high-durometer compound — around 25 % firmer than standard — providing improved control and response without sacrificing comfort.
The semi-solid design effectively reduces engine and gearbox movement under acceleration, braking, and cornering, giving sharper throttle response, smoother gear changes, and tighter handling stability.
Sold As A Set.
x2 Sets Required Per Car.
Work As Engine Mounts In 1965-1989 911/912/930
Work As Transmission Mounts In 1972-1986 911/912/930 (915/930 Transmission Only)

Fits:

• Porsche 911 1965-1968 2.0L / 912 SWB (F)
• Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1978-1983 3.0L / SC
• Porsche 911 1984-1986 3.2L
• Porsche 911 1987-1989 3.2L G50
• Porsche 911 1975-1977 3.0L Turbo (930)
• Porsche 911 1978-1989 3.3L Turbo (930)

Fits On To Diagram Ref No 6 And 49

What This Product Does:

• In the Heavy Dusty semi-solid version, the stiffer rubber reduces unwanted flex while still providing some damping, hence a compromise between fully soft and fully rigid (solid) mounts.

Symptoms / Indications That Replacement Or Upgrading Is Needed:

• Engine / gearbox movement or “rocking” under throttle or deceleration
• Clunking or banging noises from the engine bay when shifting or applying torque
• Increased vibration in the cabin or floorboard
• Misalignment over time, causing stress or wear in driveshafts, couplings, or mount brackets
• Feel of looseness or lag in throttle response or drivetrain “lash”

Why Upgrading to HD Semi-Solid Mounts Matters:

• Sharper Response & Less Flex - Because mounts deflect less, the engine / gearbox stays more stable under load, improving throttle response, shift feel, and power delivery.
  
• Better Drivetrain Alignment - Less movement helps maintain correct angle relationships between engine, gearbox, driveshafts, etc., reducing stress and wear.
  
• Improved Stability Under Load - During hard cornering, braking, or acceleration, stiffer mounts help avoid drivetrain “twist” or slop, which can upset handling balance.
  
• Dampening Retained - Semi-solid design still absorbs vibration and noise more than fully rigid mounts, providing a balanced tradeoff for street use.
  
• Straightforward Installation - Because the inserts fit existing mount shells, installation is simpler — no need for custom brackets or drastic modifications.
  
• Good for Performance / Restoration Builds - Especially in cars that see spirited driving or occasional track use, the HD semi-solid mounts are a common upgrade that improves control without completely sacrificing comfort.

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91137504306

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HD Semi-solid engine mount set. fits to existing engine or gearbox mount shell.
One kit includes 2 halves of mount.  (2 kits required per car.)

Fits:
Work as engine mounts in 1965-1989 911/912/930
Work as transmission mounts in 1972-1986 911/912/930 (915/930 Transmission Only)

High Density engine/transmission mounts are the perfect compromise between stock rubber and our Semi-Solid mounts. Their heavy duty 25% higher durometer rubber construction makes them ideal for performance oriented cars, but still allows absorption of vibrations and noise associated with solid mounts. Installs in stock motor mount or transmission mount hangers replacing worn out factory rubber.

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91137504306

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