CMS
About CMS
We specialize in Porsche transmissions, manufacturing many components and upgrades.
CMS have served the Porsche community for over 35 years and continue to do so.
Vehicle Group
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-2012
- Porsche Boxster S 987 MKII 3.4L 2009-2012
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
Information
Introducing our newest side cover for Porsche Boxster and Cayman 987 6 speed transmissions. Machined in house from 6061 T6 Aluminium.
Fits all models 2005 on* G87.20, G87.21, G87.10
*Let us know which differential you are using. We may have to modify the supplied bearing.
Fits all models 2005 on* G87.20, G87.21, G87.10
*Let us know which differential you are using. We may have to modify the supplied bearing.
Price: £725.00
Orderable
Vehicle Group
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster S 986 3.2L 2003-04
Information
Billet aluminium shift fork is a direct replacement for the fork on assembly part number 986.303.015.00.
Fits all Boxster S 6 speed transaxles G86.2
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98630301500
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Fits all Boxster S 6 speed transaxles G86.2
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98630301500
98630301500
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Price: £382.00
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Vehicle Group
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster S 986 3.2L 2003-04
Information
Billet aluminium shift fork is a direct replacement for the fork on assembly part number 986.303.013.00.
Fits all Boxster 6 speed transaxles G86.20
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98630301300
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Fits all Boxster 6 speed transaxles G86.20
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98630301300
98630301300
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Price: £382.00
Orderable
Vehicle Group
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster S 986 3.2L 2003-04
- 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
Information
Billet aluminium 1st to 2nd gear shift fork is a direct replacement for the fork on assemblies 996.303.010.00 and 986.303.010.00.
Fits
Porsche 986 Boxster S 2000-04 (6 speed)
Porsche 996 1999-2004
G86.20, G96.00, G96.01, G96.30
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99630301001
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Fits
Porsche 986 Boxster S 2000-04 (6 speed)
Porsche 996 1999-2004
G86.20, G96.00, G96.01, G96.30
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99630301001
99630301001
98630301000
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Price: £382.00
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Vehicle Group
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
Information
Replacing part for 911.301.221.00 (no longer available). Made in house from billet 6061 to correct tolerances.
Genuine Porsche bearings are recommended
Fits 911/912 64-69.5 aluminium case 901 transmissions.
90130122100, 901-301-221-00
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90130122100
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Genuine Porsche bearings are recommended
Fits 911/912 64-69.5 aluminium case 901 transmissions.
90130122100, 901-301-221-00
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90130122100
90130122100
901.301.221.00
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Price: £483.00
In stock
Vehicle Group
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
Information
Fits all Porsche 901/911/912 aluminum case transmissions.
Precision machined from 4130 Chromoly
Better supports both main and pinion shaft bearings
Improved design captures the main shaft bearing 45% more than OEM
Substantial clearance provided for even non-standard tall 1st gear ratios
Perfect fit for bearings and assembly
Much stronger than the original cast part
Replaces part 901.301.251.01 tensioning plate
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90130125101
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Precision machined from 4130 Chromoly
Better supports both main and pinion shaft bearings
Improved design captures the main shaft bearing 45% more than OEM
Substantial clearance provided for even non-standard tall 1st gear ratios
Perfect fit for bearings and assembly
Much stronger than the original cast part
Replaces part 901.301.251.01 tensioning plate
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90130125101
90130125101
901.301.251.01
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Price: £229.00
In stock
Vehicle Group
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
Information
The original Porsche 930 transmission differential side cover is made of cast aluminum, not to mention it's pretty thin.
Under load there can be a tremendous force applied to this cover, and it can break, sometimes resulting in a damaged ring and pinion-or worse.
Upgrading to a billet side plate will add significant strength and increased reliability to the differential section.
Our design features include:
A ring gear thrust bolt to reduce ring gear deflection under load
Ports that can be used for an oil cooling system
Cross drilled oil passageways for the differential bearing
Comes with (3) 3/4 - 16 O ring plugs.
Replaces part 930.301.311.02
930/30, 930/33, 930/34, 930/36, 930/37, 930/67
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93030131102
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Under load there can be a tremendous force applied to this cover, and it can break, sometimes resulting in a damaged ring and pinion-or worse.
Upgrading to a billet side plate will add significant strength and increased reliability to the differential section.
Our design features include:
A ring gear thrust bolt to reduce ring gear deflection under load
Ports that can be used for an oil cooling system
Cross drilled oil passageways for the differential bearing
Comes with (3) 3/4 - 16 O ring plugs.
Replaces part 930.301.311.02
930/30, 930/33, 930/34, 930/36, 930/37, 930/67
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93030131102
93030131102
930.301.311.02
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Price: £604.00
Orderable
Vehicle Group
- 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 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
Information
This update will allow for use of the late style 915 main shaft seal and o-ring on early transmissions ('72-'75) where the seal installs from the inside and the guide tube is not removable.
The update is a also good repair for those whom have loose, damaged or worn out guide tubes.
** This requires machining to fit
The original is machined off and a custom steel tube is fitted. It's further retained from the inside of the diff case with a high quality snap ring and sealed with the factory o-ring.
The update is a also good repair for those whom have loose, damaged or worn out guide tubes.
** This requires machining to fit
The original is machined off and a custom steel tube is fitted. It's further retained from the inside of the diff case with a high quality snap ring and sealed with the factory o-ring.
Price: £393.80
Orderable
Vehicle Group
- 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 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
Information
Our spray bar, made from stainless steel, is an excellent reproduction of the factory RSR spray bar. It allows for gear lube (presumably from a remote pump and cooler) to be returned directly to the gear mesh, including the final drive gears.
** This requires machining to the front "nose cone" housing.
We have updated our 915 spray bar kit to include an improved oil return port that will not interfere with the torsion bar tube and allows for better routing of the oil return line.
** This requires machining to the front "nose cone" housing.
We have updated our 915 spray bar kit to include an improved oil return port that will not interfere with the torsion bar tube and allows for better routing of the oil return line.
Price: £963.00
In stock
Vehicle Group
- 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 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
Information
A direct replacement for part 915.303.111.00 and 930.303.110.02.
Machined from 6061 T6 aluminium; features a replaceable threaded insert for the supplied bolt.
Fits all Porsche 915 transaxles 72-86 and 930 4 speed transaxles 76-88.
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91530311100
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Machined from 6061 T6 aluminium; features a replaceable threaded insert for the supplied bolt.
Fits all Porsche 915 transaxles 72-86 and 930 4 speed transaxles 76-88.
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91530311100
91530311100
93030311002
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Price: £382.00
Orderable
Vehicle Group
- 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
Information
Billet aluminium 5th/6th shift selector fork.
Fits all 993 6 speed transaxles C2/C4/T
G50/20/21; G64/21/21/51
Replaces part 950 303 116 00
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95030311600
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Fits all 993 6 speed transaxles C2/C4/T
G50/20/21; G64/21/21/51
Replaces part 950 303 116 00
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95030311600
95030311600
950.303.116.00
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Price: £455.00
Orderable
Vehicle Group
- Porsche 911 1987-1989 3.2L G50
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- 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
Information
The factory cast aluminum 993 fork suffers from an inherent weakness in which the steel insert that the reverse lever actuates - is prone to failure.
The cast steel RS fork does not have this issue but it's not a billet steel one like ours...and it's less expensive.
Fits all G50 5 speed transmissions '87-'94 and all G50 6 speed transmissions '95-'98 including C4, RS, Turbo and RSR models.
(G50/00, G50/01, G50/50, G50/03, G50/04, G50/05, G50/52, G64/00, G64/01, G50/20, G50/21, G50/31, G50/31, G50/33, G64/51, G64/52)
Replaces part 950.303.113.04, 950.303.103.00, 950.303.113.04, 950.303.103.06
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95030311304
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The cast steel RS fork does not have this issue but it's not a billet steel one like ours...and it's less expensive.
Fits all G50 5 speed transmissions '87-'94 and all G50 6 speed transmissions '95-'98 including C4, RS, Turbo and RSR models.
(G50/00, G50/01, G50/50, G50/03, G50/04, G50/05, G50/52, G64/00, G64/01, G50/20, G50/21, G50/31, G50/31, G50/33, G64/51, G64/52)
Replaces part 950.303.113.04, 950.303.103.00, 950.303.113.04, 950.303.103.06
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95030311304
95030311304
950.303.113.04
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Price: £721.00
Orderable
Vehicle Group
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 GT3 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII GT3 2010-11
- Porsche 997 MKII GT2 RS 2011-13
Information
Billet aluminum shift fork is of motorsport quality and is an ideal replacement for street or track.
Proper rail to fork interference fit; maintains correct tolerances
Improved design reduces the chance of stripped threads
Uses factory torque specs and our supplied hardware
Fits all 996T, 996 & 997 GT2 & GT3 including RS.
G96/50, G96/88, G96/90, G96/93, G96/96, G97/88, G97/90, G97/92
Replaces part 996.303.115.50
Fits:
Porsche 996 Turbo / Turbo GT2 2001-05
Porsche 997 Turbo GT2 2008-09
Porsche 997 GT2 RS 2011
Porsche 996 GT3 2001-05
Porsche 997 GT3 / 997 GT3 RS 2007-11
Click 'Zoom in' for large parts diagram.
Diagram ref no 12
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99630311550
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Proper rail to fork interference fit; maintains correct tolerances
Improved design reduces the chance of stripped threads
Uses factory torque specs and our supplied hardware
Fits all 996T, 996 & 997 GT2 & GT3 including RS.
G96/50, G96/88, G96/90, G96/93, G96/96, G97/88, G97/90, G97/92
Replaces part 996.303.115.50
Fits:
Porsche 996 Turbo / Turbo GT2 2001-05
Porsche 997 Turbo GT2 2008-09
Porsche 997 GT2 RS 2011
Porsche 996 GT3 2001-05
Porsche 997 GT3 / 997 GT3 RS 2007-11
Click 'Zoom in' for large parts diagram.
Diagram ref no 12
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99630311550
99630311550
99630311550
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Price: £334.00
Orderable
Vehicle Group
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
Information
Our billet aluminum differential side cover is much stronger than the factory magnesium counterpart and will help reduce gear deflection under load.
Our version uses the larger 930 turbo taper bearing and features a replaceable clutch cable bracket.
You must use differential bearing 999.059.064.00
You can use the stock studs, axle seal, o-ring and factory preload setting.
Fits Porsche 911 70-71 side cover with clutch cable bracket for pull clutch
Replaces part: 901.301.311.12
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90130131112
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Our version uses the larger 930 turbo taper bearing and features a replaceable clutch cable bracket.
You must use differential bearing 999.059.064.00
You can use the stock studs, axle seal, o-ring and factory preload setting.
Fits Porsche 911 70-71 side cover with clutch cable bracket for pull clutch
Replaces part: 901.301.311.12
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90130131112
90130131112
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Price: £399.00
Orderable
Vehicle Group
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster S 986 3.2L 2003-04
- 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
Information
Our aluminum side cover fits much more precisely and will not "float" - causing gear misalignment - like the factory cast ones do.
Also incorporated is a differential bearing oiling provision.
Fits all Porsche 996 and Boxster S 986 6 speed manual transmissions.
G86/20, G96/00, G96/01, G96/30, G96/31
Replaces part 996.301.312.00 or 986.301.312.00
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99630131200
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Also incorporated is a differential bearing oiling provision.
Fits all Porsche 996 and Boxster S 986 6 speed manual transmissions.
G86/20, G96/00, G96/01, G96/30, G96/31
Replaces part 996.301.312.00 or 986.301.312.00
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99630131200
996.301.312.00
986.301.312.00
99630131200
98630131200
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Price: £604.00
In stock
Vehicle Group
- 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 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
Information
It's not uncommon for the original thrust washer on the main shaft between 3rd and 6th gear to fail causing serious damage inside your transmission. We now offer a stronger billet thrust washer with specially designed oil grooves which promotes lubrication to 3rd and 6th gear needle cage bearings.
Fits all Porsche 996 and Boxster S 986 transmissions. G86/20, G96/00, G96/01, G96/30, G96/31
Replaces part 996.302.296.00
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99630229600
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Fits all Porsche 996 and Boxster S 986 transmissions. G86/20, G96/00, G96/01, G96/30, G96/31
Replaces part 996.302.296.00
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99630229600
996.302.296.00
99630229600
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Price: £146.00
Orderable