Enter your VAT number here and click Verify:
Your details have been verified. VAT number registered to:
,
.
Your order will now be zero rated for VAT purposes. We reserve the right to verify these details after your order request has been made and reinstate VAT if required.
Your VAT details were not recognised or were invalid. Your VAT number must be matched to your Billing Country as specified above. This is currently specified as . You do not need to enter the country code part of your VAT number as this has already been selected in your billing address details above.
The VAT number checking service is currently offline. Please supply your VAT details within the comments or special instructions field below and we will apply a VAT discount after placing your order request.
Aasco
Aasco for Porsche
Aasco Performance Inc. was founded in 1995 by brothers Dennis and Randall Aase who's passion for Porsche Motorsports has expanded over 80 years of combined experience and expertise in quality race proven parts and services.100% American made - Designed and manufactured in our Southern California facility.
A Quick Look at Aasco
Aasco Performance Inc. was founded in 1995 by brothers Dennis and Randall Aase who's passion for Porsche Motorsports has expanded over 80 years of combined experience and expertise in quality race proven parts and services.100% American made - Designed and manufactured in our Southern California facility.
Choosing the Right Fit for Your Porsche
Where Aasco is listed for Porsche, use the supplied model coverage and OE references to confirm suitability. Check details that commonly affect fitment such as model year, side/position, and connector type where relevant.
- Typical reasons to choose these Aasco parts include sharper clutch engagement, reduced rotating mass, and improved durability for fast-road or track-focused Porsche use, often combined with clutch replacement to avoid repeat labour.
- Common real-world triggers for replacement include clutch slip under load, high bite point, judder on take-off, or noise from worn flywheels, especially on higher-mileage cars or those used spiritedly.
- Practical tip: some lightweight clutch and flywheel setups can increase drivetrain chatter; suitability for daily driving depends on the specific design and specification chosen.
- Practical tip: when the gearbox is out, it is sensible to address related wear items and oil leaks such as the rear main seal to avoid future labour duplication.
Browse by Category
If you already know the area you are working on, start with the category and then filter by Porsche model. Where real-world symptoms and typical reasons to replace are provided, use them to keep the wording grounded.
Engine Tuning — Engine tuning parts for Porsche are typically chosen to improve drivability, throttle response, or support hardware changes such as intake, exhaust, or forced induction where listed. They can also help refine running after repairs, provided the engine is mechanically healthy.
Clutches / Flywheels — Clutch and flywheel components for Porsche are replaced when there is slip, judder, noise, or during major drivetrain work. Upgraded parts are often selected to handle higher torque or give a sharper, more direct response where appropriate.
Gearbox / Transmission — Gearbox and transmission parts are used when there are issues such as whining, hard or noisy shifts, leaks, or when refreshing a high-mileage Porsche drivetrain. Correct compatibility with manual, Tiptronic, or PDK applications is essential.
Flywheel / Torque — Flywheels and torque-related components are replaced when there is judder, excessive play, heat damage, or when upgrading for different drivability characteristics on a Porsche. The right choice helps balance smoothness, response, and durability.
Special Offer Parts — Special offer parts are often used when tackling common Porsche wear items such as brakes, suspension, ignition, or service components, allowing several items to be refreshed together during planned maintenance.
- Tip: before performance tuning, check compression or leak-down, fueling health, sensor data, and for any boost or vacuum leaks so that calibration changes are not masking underlying faults.
- Tip: when replacing clutches or flywheels on a Porsche, consider a complete kit and, where applicable, new bolts and associated release components to make best use of the labour involved.
Explore Aasco at Design911
View the current Aasco range for Porsche at Design911, then filter by model and category to narrow down to the right parts.
Sprung centre plate gives a more compliant drivetrain feel over the rigid centre plate version
Contains Aasco flywheel and Sachs Performance clutch kit.
Fits:
Porsche 996 Carrera / Carrera 4 3.4ltr - 1997 to 2001 (non turbo)
Porsche 997.1 Carrera / 4 3.6ltr - 2005 to 2008 (non Turbo)
- AASCO Flywheel with bolts
- Sachs Performance pressure plate
- Sachs Performance drive plate (sprung)
- Sachs bearing
- Clutch bolts
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
POWERCLUTCH4
The product you are viewing cross references to these numbers
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08

Fits:
Porsche 993 - 1994 to 1998
Our Valve Springs are designed and manufactured to specifically fit the envelope of a Porsche application not a spring from another use.
It operates a higher natural frequency than the original spring for racing and at the very least minimizes damage from over rev in track day situations.
Kit includes
High performance valve spring x 12
High performance valve spring seat x 12
High performance 8mm titanium valve spring retainer disc x 12
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
HP10T8HPSSKIT
The product you are viewing cross references to these numbers
- 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

Fits:
Porsche 911 - 1965 to 1989
Porsche 964 - 1989 to 1994
Our Valve Springs are designed and manufactured to specifically fit the envelope of a Porsche application not a spring from another use.
It operates a higher natural frequency than the original spring for racing and at the very least minimizes damage from over rev in track day situations.
Kit includes
High performance valve spring x 12
High performance valve spring seat x 12
High performance 9mm titanium valve spring retainer disc x 12
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
HP109HSSKIT
The product you are viewing cross references to these numbers
- 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)
- 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

Fits:
Porsche 911 - 1965 to 1989
Porsche 964 - 1989 to 1994
9mm Porsche 911 titanium valve spring retainers for 9mm valves.
Can be used to directly replace OE retainers but we recommend using in conjunction with Aasco HP109 valve springs and HPSS spring seats.
Set of 12
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
HP10T9
The product you are viewing cross references to these numbers
- 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)
- 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

Fits:
Porsche 993 - 1994 to 1998
8mm Porsche 911 Titanium Retainers for 993 1995-1998 for 8mm valves.
Please note
Must be used in conjunction with Aasco HP109-Valve Springs and HPSS Spring Seats.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
HP10T8
The product you are viewing cross references to these numbers
- 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

Fits:
Porsche 911 - 1965 to 1989
Porsche 964 - 1989 to 1994
Porsche 993 - 1994 to 1998
Our Steel Spring Seats pocket the inner spring of our Aasco High Performance Valve Springs.
Our Valve Springs are designed and manufactured to specifically fit the envelope of a Porsche application not a spring from another use.
It operates a higher natural frequency than the original spring for racing and at the very least minimizes damage from over rev in track day situations.
Please note
993 - must use 8mm Ti retainers and Aasco Seats
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
HPSS
The product you are viewing cross references to these numbers
- 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)
- 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

Fits:
Porsche 911 - 1965 to 1989
Porsche 964 - 1989 to 1994
Porsche 993 - 1994 to 1998
Our Valve Springs are designed and manufactured to specifically fit the envelope of a Porsche application not a spring from another use.
It operates a higher natural frequency than the original spring for racing and at the very least minimizes damage from over rev in track day situations.
Please note
993 - must use 8mm Ti retainers and Aasco Seats
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
HP109
The product you are viewing cross references to these numbers
- 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)
- 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
for Porsche 996/997 non-turbo, Boxster/Cayman

Fits:
Part: 106411-11
Part: 106412-11Part: 106417-11
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
BLT6411
The product you are viewing cross references to these numbers
- We are unable to provide fitting details for this product at this time. Please contact us for further information.
Includes Sachs Performance clutch kit

Fits:
Porsche 997.2 & 991 997.2 2009-16 3.6L/3.8L
Steel DFI
Features:
• Light-weight for improved performance and drastically reduced M.O.I.
• Replaceable heat shield (friction surface), no need to surface flywheel
• OEM clutches bolt on for easy installation
• High tolerance manufacturing to insure a perfect hassle free installation
• Designed for normal street use for every day performance enthusiasts
• Stepped dowel pins so they are held captive by the clutch cover
• Racing parts available for the professional
• Highest quality materials like 6061-T6 aluminum for the flywheel, treated steel for the heat shield and OEM quality starter ring gears
• CAD designed/ CNC machined in house for the ultimate in quality control
• One year limited warranty on production components
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
106425-12-PKG
The product you are viewing cross references to these numbers
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
- Porsche 991.1 Carrera C2 3.4L (350Bhp) 2012-16
- Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Carrera C4 3.4L (350Bhp) 2012-16
- Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16
Complete Kit with Sachs Performance Clutch
Steel - 18LBS
Can be used with ODB1 EMS

Fits:
Porsche 993 TURBO 3.6L 1996-98 (OBDII ONLY)
Porsche 996 TURBO 3.6L 1999-05
Porsche 997 TURBO 3.6L 2006-13
Porsche 997 GT3 3.6L 2006 - 2009
Features:
• Light-weight for improved performance and drastically reduced M.O.I. (Moment of Inertia)
• Replaceable heat shield (friction surface), no need to surface flywheel
• OEM clutches bolt on for easy installation
• High tolerance manufacturing to insure a perfect hassle free installation
• Designed for normal street use for every day performance enthusiasts
• Stepped dowel pins so they are held captive by the clutch cover
• Racing parts available for the professional
• Highest quality materials like 6061-T6 aluminum for the flywheel, treated steel for the heat shield and OEM quality starter ring gears
• CAD designed/ CNC machined in house for the ultimate in quality control
• One year limited warranty on production components
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
106431-12-KIT
The product you are viewing cross references to these numbers
- Porsche 993 (911) TURBO 1994-96
- Porsche 996 TURBO 2000-05
- Porsche 997 MK1 TURBO 2007-09
Complete Clutch And Flywheel Package.
Includes:
Aasco Flywheel - 106413-11
Sachs Performance Pressure Plate - 883082999764
Sachs Performance Clutch Disc - 881861999856
Includes Sachs Release Bearing And All Necessary Installation Hardware.
Fits:
Porsche 993 3.6L 1996>>1998 (OBDII ONLY)
Porsche 993 TURBO 3.6L 1996>>1998 (OBDII ONLY)
Porsche 996 TURBO 3.6L 1999>>2005
Porsche 997 TURBO 3.6L 2006>>2013
Porsche 997 GT3 3.6L 2006>>2009
*** Please see installation instructions page, Larger portion of the spring carrier must face towards the flywheel so as the clutch diaphragm spring will not contact the clutch disc. Failure to follow this procedure will result in clutch failure and not covered by any warranty due to improper installation***
Features:
• Light-weight for improved performance and drastically reduced M.O.I.
• Replaceable heat shield (friction surface), no need to surface flywheel
• OEM clutches bolt on for easy installation
• High tolerance manufacturing to insure a perfect hassle free installation
• Designed for normal street use for every day performance enthusiasts
• Stepped dowel pins so they are held captive by the clutch cover
• Racing parts available for the professional
• Highest quality materials like 6061-T6 aluminum for the flywheel, treated steel for the heat shield and OEM quality starter ring gears
• CAD designed/ CNC machined in house for the ultimate in quality control
• One year limited warranty on production components
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
106413-11-PKG
The product you are viewing cross references to these numbers
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) TURBO S 1994-97
- Porsche 996 TURBO 2000-05
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 2007-09
- Porsche 997 MKII Turbo 2010-13
includes Sachs Performance clutch.

Fits:
Porsche 987.2 Boxster S 3.4L 2009-12
Porsche 987.2 Cayman S 3.4L 2009-12
Porsche 981 Boxster S 3.4L 2013>>
Porsche 981 Cayman S 3.4L 2013>>
*** Please see installation instructions page, Larger portion of the spring carrier must face towards the flywheel so as the clutch diaphragm spring will not contact the clutch disc. Failure to follow this procedure will result in clutch failure and not covered by any warranty due to improper installation.
Features:
• Light-weight for improved performance and drastically reduced M.O.I.
• Replaceable heat shield (friction surface), no need to surface flywheel
• OEM clutches bolt on for easy installation
• High tolerance manufacturing to insure a perfect hassle free installation
• Designed for normal street use for every day performance enthusiasts
• Stepped dowel pins so they are held captive by the clutch cover
• Racing parts available for the professional
• Highest quality materials like 6061-T6 aluminum for the flywheel, treated steel for the heat shield and OEM quality starter ring gears
• CAD designed/ CNC machined in house for the ultimate in quality control
• One year limited warranty on production components
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
106423-12-PKG
The product you are viewing cross references to these numbers
- Porsche Boxster S 987 MKII 3.4L 2009-2012
- Porsche Boxster 981 S / GTS 3.4L 2012-16
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
- Porsche Cayman S / GTS 3.4L 981 2013-16

Fits:
Porsche 718 Cayman GT4 4.0L 2020-21
Features:
• Light-weight for improved performance and drastically reduced M.O.I. (Moment of Inertia)
• OEM clutches bolt on for easy installation
• High tolerance manufacturing to insure a perfect hassle free installation
• Designed for normal street use for every day performance enthusiasts
• Stepped dowel pins so they are held captive by the clutch cover
• Racing parts available for the professional
• Highest quality materials for the flywheel like treated steel and OEM quality starter ring gears
• CAD designed/ CNC machined in house for the ultimate in quality control
• One year limited warranty on production components
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
106447-12
The product you are viewing cross references to these numbers
- Porsche Cayman GT4 718 4.0L / GT4 RS 718 4.0L

Fits:
Porsche 996 3.4L / 3.6L 1999-04
Porsche 997.1 3.6L 2005-08
NOT for Turbo models
Weight: 8kg
Features:
• Light-weight for improved performance and drastically reduced M.O.I. (Moment of Inertia)
• OEM clutches bolt on for easy installation
• High tolerance manufacturing to insure a perfect hassle free installation
• Designed for normal street use for every day performance enthusiasts
• Stepped dowel pins so they are held captive by the clutch cover
• Racing parts available for the professional
• Highest quality materials for the flywheel like treated steel and OEM quality starter ring gears
• CAD designed/ CNC machined in house for the ultimate in quality control
• One year limited warranty on production components
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
106437-12
The product you are viewing cross references to these numbers
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08

Fits:
Porsche 986 Boxster 2.5L / 2.7L / 3.2L 1997-04
Porsche 987.1 Boxster 2.7L / 3.2L / 3.4L 2004-08
Porsche 987C.1 Cayman 2.7L / 3.4L 2004-08
Features:
Aasco Billet Steel Midweight Flywheel For Porsche 986 & 987 Boxster and Cayman models. Aasco Flywheel 106436-12 (18lbs)Includes Flywheel Crank bolts *Please see installation instructions page, Larger portion of the spring carrier must face towards the flywheel so as the clutch diaphragm spring will not contact the clutch disc.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
106436-12
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005 -08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
Mid-Weight 18LBS can be used with ODB1 EMS

Fits:
Porsche 964 3.6L 1991-1994 (OBD1 ONLY)
Porsche 993 3.6L 1996-98 (OBDII ONLY)
Porsche 993 TURBO 3.6L 1996-98 (OBDII ONLY)
Porsche 996 TURBO 3.6L 1999-05
Porsche 997 TURBO 3.6L 2006-13
Porsche 997 GT3 3.6L 2006 - 2009
Features:
• Light-weight for improved performance and drastically reduced M.O.I.
• Replaceable heat shield (friction surface), no need to surface flywheel
• OEM clutches bolt on for easy installation
• High tolerance manufacturing to insure a perfect hassle free installation
• Designed for normal street use for every day performance enthusiasts
• Stepped dowel pins so they are held captive by the clutch cover
• Racing parts available for the professional
• Highest quality materials like 6061-T6 aluminum for the flywheel, treated steel for the heat shield and OEM quality starter ring gears
• CAD designed/ CNC machined in house for the ultimate in quality control
• One year limited warranty on production components
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
106431-12
The product you are viewing cross references to these numbers
- Porsche 993 (911) TURBO 1994-96
- Porsche 996 TURBO 2000-05
- Porsche 997 MK1 TURBO 2007-09