Upgrade the clutch system in a compatible naturally aspirated 3.0L BMW with the ACT BM15-HDSS Heavy Duty Performance Street Sprung Clutch Kit.
This kit combines ACT’s Heavy Duty pressure plate with a sprung-hub Performance Street clutch disc. It is designed for drivers who need increased torque capacity while retaining smooth, positive engagement suitable for regular street use.
The Heavy Duty pressure plate uses ACT’s exclusive diaphragm design to increase clamp load, reduce deflection, and support consistent clutch performance and service life. Each diaphragm undergoes a four-stage heat-treatment process, while precision-stamped pressure-plate covers help maintain rigidity and consistent operation.
The Performance Street disc uses premium organic friction material with a high copper content to improve heat transfer. Steel-backed friction linings provide additional strength and durability, while reduced marcel helps deliver quicker shift response.
ACT rates this kit for 465 lb-ft of torque at the engine, representing approximately 52% more torque capacity than the original clutch. Pedal effort is described as light to moderate, with smooth positive engagement. Mild gear noise may be present depending on the vehicle and flywheel setup.
An ACT flywheel is required and is not included with this clutch kit.
Product Features
- ACT Heavy Duty pressure plate
- Performance Street sprung clutch disc
- Organic friction material with high copper content
- Steel-backed friction linings
- Sprung-hub disc for street-friendly engagement
- Light to moderate pedal effort
- Smooth, positive clutch engagement
- Rated for up to 465 lb-ft of engine torque
- Approximately 52% more torque capacity than the comparable oe clutch
- 240mm clutch-disc diameter
- 100% clamp-load tested
- Dynamically computer balanced
- Suitable for street and select performance applications
- Pressure-plate bolts included
- ACT part number BM15-HDSS
Important Flywheel Requirement
This clutch kit must be used with a compatible ACT flywheel.
The required flywheel is sold separately and is not included with this listing. ACT identifies the compatible XACT Streetlite flywheel as part number 601170.
Do not install this clutch kit with the original flywheel or an unapproved aftermarket flywheel.
Vehicle Fitment
Fits select naturally aspirated BMW models equipped with compatible 3.0L inline-six engines and manual transmissions.
BMW 1 Series
- 2008–2013 BMW 128i
BMW 3 Series
- 2006 BMW 325i
- 2006 BMW 325xi
- 2007–2013 BMW 328i
- 2009–2013 BMW 328i xDrive
- 2007–2008 BMW 328xi
- 2006 BMW 330i
- 2006 BMW 330xi
BMW 5 Series
- 2006–2007 BMW 525i
- 2006–2007 BMW 525xi
- 2008–2010 BMW 528i
- 2008 BMW 528xi
- 2006–2007 BMW 530i
- 2006–2007 BMW 530xi
BMW X3
- 2007–2008 BMW X3 3.0si
BMW Z4
- 2009–2011 BMW Z4 sDrive30i
Fitment is limited to compatible manual-transmission applications. Verify the exact year, model, engine, transmission, flywheel, and original clutch dimensions before ordering.
Product Specifications
- Manufacturer: ACT
- Product: Heavy Duty Performance Street Sprung Clutch Kit
- ACT Part Number: BM15-HDSS
- Pressure Plate Type: Heavy Duty
- Clutch Disc Type: Performance Street sprung
- Disc Material: Organic
- Disc Diameter: 9.4 inches / 240mm
- Input Shaft Diameter: 1.125 inches
- Torque Capacity: 465 lb-ft at the engine
- Torque Capacity Increase: Approximately 52% over original equipment
- Pedal Feel: Light to moderate
- Engagement: Smooth and positive
- Product Weight: Approximately 13.8 pounds
- UPC: 842385024505
- Quantity: One clutch kit
Kit Contents
- ACT Heavy Duty pressure plate
- ACT Performance Street sprung clutch disc
- M8-1.25 x 20mm pressure-plate bolts
Only the components specifically listed above should be considered included. The flywheel and any additional installation or service components are sold separately unless specifically shown or stated.
Recommended Use
The BM15-HDSS is suitable for:
- Daily-driven street vehicles
- Naturally aspirated and mildly modified performance builds
- Mildly modified BMW applications
- Aggressive street driving
- Select road-course or race use
Actual clutch life and behavior depend on vehicle power, driving style, installation quality, flywheel condition, vehicle weight, and operating conditions.
Installation Note
Professional clutch installation is strongly recommended.
Clutch replacement requires transmission removal and specialized tools. Inspect the rear main seal, transmission input seal, clutch-release system, pilot support components, transmission mounts, and related hardware while the transmission is removed.
The compatible ACT flywheel must be installed according to ACT specifications. Confirm proper disc orientation, pressure-plate alignment, bolt torque, and release-system adjustment before operating the vehicle.
Follow ACT’s required clutch break-in procedure before aggressive driving or full-power use.
Proposition 65 Warnings.
Cancer and Reproductive Harm. See details below.
Items that are not CARB Legal will not be sold and ship to California or CARB states.
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