SuperTech High Performance Valve Spring Kit, BMW M50/M52/S50/S52

Supertech high-performance valve springs for BMW M50, M52, S50, and S52 engines are engineered to meet the demands of high-RPM use with unmatched reliability and performance. Utilizing Superclean Chrome Silicon Vanadium Steel alloy, these valve springs ensure exceptional strength, structural memory, and longevity under intense conditions. The advanced computer-aided design minimizes wire stress and effectively manages valve harmonics, leading to optimized performance for racing applications.

Included are Supertech's precision CNC-machined titanium retainers, crafted from military-certified alloy to guarantee an accurate fit and lighter valvetrain weight. Supertech’s quality and precision provide superior durability, making them the ideal choice for enthusiasts seeking maximum reliability for their BMW's performance engine.

Installation requires the expertise of an engine builder.

Seat Pressure Options:

80 lbs

• Seat Pressure: 80lbs@35.70mm
• Open Pressure: 195lbs@10mm
• Max Lift: 12.70mm
• Coil Bind: 20.70mm
• InnSpr.OD: 20.50mm
• InnSpr.ID: 15.50mm
• Rate: 11.50lbs/mm
• Kit spring: SPR-H1000D
• Kit spring qty: 24
• Retainer: RET-AUVE/T1
• Retainer qty: 24
• Seat Locator: SEAT-BM60
• OutSpr.OD: 29.65mm
• OutSpr.ID: 21.85mm
• Seat Locator qty: 24

94  lbs

• Seat Pressure: 94lbs@35.70mm
• Open Pressure: 209lbs@10mm
• Max Lift: 12.50mm
• Coil Bind: 20.70mm
• InnSpr.OD: 20.50mm
• InnSpr.ID: 15.50mm
• Rate: 11.50lbs/mm
• Kit spring: SPR-H1005D
• Kit spring qty: 24
• Retainer: RET-AUVE/T1
• Retainer qty: 24
• Seat Locator: SEAT-BM60
• OutSpr.OD: 29.65mm
• OutSpr.ID: 21.85mm
• Seat Locator qty: 24

BMW M50 Applications:

3 Series

1990-1995     E36     320i / 325i / 325is
1994-1996     E35/E36     318ti

5 Series

1990-1996     E34     520i / 525i
1991-1996     E34 Touring     520i / 525i

Z Series

1995     E36/E37     Z3 2.0i / 2.5i

BMW M52 Applications:

3 Series

1994-1999     E36     320i / 323i / 323is / 328i / 328is
1997-2000     E35/E36     318ti / 323ti

5 Series

1996-1998     E39     520i / 523i / 528i

7 Series

1996-1998     E38     728i / 728iL

Z Series

1996-1999     E36/E37/E38     Z3 2.0i / 2.2i / 2.8i

BMW S50 US Applications:

3 Series

1994-1995     E36     M3

BMW S52 Applications:

3 Series

1996-1999     E36     M3

Z Series

1998-2000     E36/E37/E38     Z3M