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rubber isolator Genuine Porsche part 99337521900
• This part is brand new and unused.
• Please verify that it is 100% suitable for your specific vehicle before purchase to ensure compatibility.
Before purchasing thoroughly check part to confirm compatibility.
- We are unable to provide fitting details for this product at this time. Please contact us for further information.
This part includes an optional support washer with a built in insert to fit into the voided bush for quick and easy tuning of stiffness levels. This part replaces the original bush OE number: 99337521900 in bracket assembly OE number: 96437502301 found on AWD vehicles.
For an insert only please use PFR57-123.

This part fits the following vehicles:
Porsche 993 C4/C4S 1995-1998 Manual - Transmission type G64.20/G64.21
Porsche 993 Turbo 1995-1998 Manual - Transmission type G64.51/G64.52
Porsche 964 C4 1990-1994 Manual - Transmission type G64.00/01/02
OEM Part Number: 99337521900
OEM Part Number: 99337502300
OEM Part Number: 96437502301
Click 'Zoom in' for large parts diagram.
Diagram ref no 1
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Related, superseded, cross reference or alternative numbers for comparison.
PFR57-122
The product you are viewing cross references to these numbers
- Porsche 964 (911) C4 1989-93
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
For a replacement bush please use PFR57-122.

This part fits the following vehicles:
Porsche 993 C4/C4S 1995-1998 Manual - Transmission type G64.20/G64.21
Porsche 993 Turbo 1995-1998 Manual - Transmission type G64.51/G64.52
Porsche 964 C4 1990-1994 Manual - Transmission type G64.00/01/02
OEM Part Number: 99337521900
OEM Part Number: 99337502300
OEM Part Number: 96437502301
Click 'Zoom in' for large parts diagram.
Fits to no 1 on 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 responsitive steering
- Longer service life of suspension components
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PFR57-123
The product you are viewing cross references to these numbers
- Porsche 964 (911) C4 1989-93
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
This part includes an optional support washer with a built in insert to fit into the voided bush for quick and easy tuning of stiffness levels. This part replaces the original bush OE number: 99337521900 in bracket assembly OE number: 96437502301 found on AWD vehicles.
For an insert only please use PFR57-123.

This part fits the following vehicles:
Porsche 993 C4/C4S 1995-1998 Manual - Transmission type G64.20/G64.21
Porsche 993 Turbo 1995-1998 Manual - Transmission type G64.51/G64.52
Porsche 964 C4 1990-1994 Manual - Transmission type G64.00/01/02
OEM Part Number: 99337521900
OEM Part Number: 99337502300
OEM Part Number: 96437502301
Click 'Zoom in' for large parts diagram.
Diagram ref no 1
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.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PFR57-122BLK
The product you are viewing cross references to these numbers
- Porsche 964 (911) C4 1989-93
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
This is an insert to fit into and fill the voids in the original bush OE number: 99337521900 in bracket assembly OE number: 96437502301 found on AWD vehicles.
For a replacement bush please use PFR57-122.

This part fits the following vehicles:
Porsche 993 C4/C4S 1995-1998 Manual - Transmission type G64.20/G64.21
Porsche 993 Turbo 1995-1998 Manual - Transmission type G64.51/G64.52
Porsche 964 C4 1990-1994 Manual - Transmission type G64.00/01/02
OEM Part Number: 99337521900
OEM Part Number: 99337502300
OEM Part Number: 96437502301
Click 'Zoom in' for large parts diagram.
Fits to no 1 on 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.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PFR57-123BLK
The product you are viewing cross references to these numbers
- Porsche 964 (911) C4 1989-93
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
For a replacement bush please use PFR57-122.

This part fits the following vehicles:
Porsche 993 C4/C4S 1995-1998 Manual - Transmission type G64.20/G64.21
Porsche 993 Turbo 1995-1998 Manual - Transmission type G64.51/G64.52
Porsche 964 C4 1990-1994 Manual - Transmission type G64.00/01/02
OEM Part Number: 99337521900
OEM Part Number: 99337502300
OEM Part Number: 96437502301
Click 'Zoom in' for large parts diagram.
Fits to no 1 on 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.
PFR57-123H
The product you are viewing cross references to these numbers
- Porsche 964 (911) C4 1989-93
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
This part includes an optional support washer with a built in insert to fit into the voided bush for quick and easy tuning of stiffness levels. This part replaces the original bush OE number: 99337521900 in bracket assembly OE number: 96437502301 found on AWD vehicles.
For an insert only please use PFR57-123.

This part fits the following vehicles:
Porsche 993 C4/C4S 1995-1998 Manual - Transmission type G64.20/G64.21
Porsche 993 Turbo 1995-1998 Manual - Transmission type G64.51/G64.52
Porsche 964 C4 1990-1994 Manual - Transmission type G64.00/01/02
OEM Part Number: 99337521900
OEM Part Number: 99337502300
OEM Part Number: 96437502301
Click 'Zoom in' for large parts diagram.
Diagram ref no 1
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.
PFR57-122H
The product you are viewing cross references to these numbers
- Porsche 964 (911) C4 1989-93
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
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