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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.
For an insert only please use PFR57-126.
Replacement for OE Porsche part: 96437505502, 96437505580,

This bush fits the following RWD vehicles:
Porsche 964 C2 1990-1994 Manual - Transmission type G50.03/G50.04/G50.05)
Porsche 964 Turbo 1991-1992 Manual - Transmission type G50.52)
Porsche 964 C2 1992-1994 Tiptronic - Transmission type A50.02/A50.03
Porsche 993 C2 1994-1998 Manual - Transmission type G50.20/G51.21
Porsche 993 C2 1994-1998 Tiptronic - Transmission type A50.04/A50.05
Click 'Zoom in' for large parts diagram.
Diagram ref no 23
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Related, superseded, cross reference or alternative numbers for comparison.
PFR57-125BLK
The product you are viewing cross references to these numbers
- Porsche 964 (911) C2 1989-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C2S 1994-97
SET OF 2 for both wishbones
Fits to Wishbone OEM Part Number: 96434101706 / 96434101707 / 96434101806
Fits to Wishbone OEM Part Number: 96434101807 / 96434101780 / 96434101782
Fits to Wishbone OEM Part Number: 96434101880 / 9643410182

Fits:
Porsche 964 1990-94
Porsche 993 1994-97
Click 'Zoom in' for large parts diagram.
Fits to No 12 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Related, superseded, cross reference or alternative numbers for comparison.
PFF57-101H
The product you are viewing cross references to these numbers
- 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
Porsche Powerflex Black Series Bushes
Powerflex Black Series bushes are the most focused suspension bush upgrade available for Porsche models, created specifically for fast road, track and motorsport use. At Design911, we offer the full Black Series range so you can tailor your Porsche chassis for precise, repeatable geometry and a more connected, competition-oriented feel.
Powerflex Black Series - Designed for the Track
Black Series bushes use a very firm 95 Shore A polyurethane compound developed by Powerflex for maximum control of chassis movement. Compared with typical OE rubber, this material is far more resistant to load, flex and deformation, helping the suspension maintain its intended geometry under hard use.
Engineered for geometry control
The key focus of Powerflex Black Series is stability and precision rather than comfort. By significantly limiting bush deflection, these components help keep alignment settings more consistent during heavy braking, cornering and acceleration, which is particularly valuable on track or in aggressive fast-road driving where standard rubber can move and compress.
Track-focused, Porsche-specific applications
Each bush is designed around specific Porsche arms, mounts and locations, with attention to sizing, crush-tube design and lubrication grooves. This Porsche-specific engineering helps ensure that, when installed correctly, the bushes articulate as intended and support smooth suspension movement despite the very firm compound.
What to expect in use
Because Black Series bushes are substantially stiffer than standard rubber and even firmer than Powerflex’s usual performance grade materials, they will generally increase noise, vibration and harshness (NVH) compared with OE. Many owners therefore choose them for focused builds, track-orientated cars, or key suspension locations where geometry control matters most, rather than fitting them in every single position on a daily-driven Porsche.
Choosing Powerflex Black Series for your Porsche
If your priority is crisp response, consistency on circuit days and long-term durability under high loads, Powerflex Black Series bushes are a strong option. If you prefer more road comfort, you may wish to combine Black Series parts in critical locations with softer compounds elsewhere. Our team at Design911 can help you choose the most appropriate combination for your model and intended use.
Installation & setup
Correct installation, lubrication and torque settings are essential with any polyurethane bush, especially a very firm compound like Black Series. After fitting suspension bushes, a proper four-wheel alignment is strongly recommended so your Porsche benefits fully from the more stable geometry. Where applicable, follow Powerflex’s guidance on lubrication and tightening with the suspension at normal ride height.
Explore Powerflex Black Series bushes for Porsche
Browse our Powerflex Black Series range for Porsche models at Design911 to find chassis bushes for control arms, trailing arms, anti-roll bars and other key locations. Whether you are building a dedicated track car or a fast-road Porsche with a sharper, more precise feel, these bushes provide a track-orientated foundation for your suspension setup.