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- Porsche Boxster 718 2.0L Manual (300 Bhp) 2017>>
- Porsche Boxster S 718 2.5L Manual (350 Bhp) 05/2017>>
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- Porsche Boxster GTS 718 2.5L Manual (365 Bhp) 05/2017>>
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- Porsche Cayman S 718 2.5L Manual (350 Bhp)
- Porsche Cayman S 718 2.5L PDK (350 Bhp)
- Porsche Cayman T 718 2.0L Manual (300 Bhp)
- Porsche Cayman T 718 2.0L PDK (300 Bhp)
- Porsche Cayman GTS 718 2.5L Manual (365 Bhp)
- Porsche Cayman GTS 718 2.5L PDK (365 Bhp)
Sold as a pair
Fits:
Porsche Boxster 718 2.0L Manual (300 Bhp)
Porsche Boxster S 718 2.5L Manual (350 Bhp)
Porsche Boxster S 718 2.5L PDK (350 Bhp)
Porsche Boxster T 718 2.0L Manual (300 Bhp)
Porsche Boxster T 718 2.0L PDK (300 Bhp)
Porsche Boxster GTS 718 2.5L Manual (365 Bhp)
Porsche Boxster GTS 718 2.5L PDK (365 Bhp)
Porsche Cayman 718 2.0L Manual (300Bhp
Porsche Cayman 718 2.0L PDK (300Bhp)
Porsche Cayman S 718 2.5L Manual (350Bhp)
Porsche Cayman S 718 2.5L PDK (350Bhp)
Porsche Cayman T 718 2.0L Manual (300Bhp)
Porsche Cayman T 718 2.0L PDK (300 Bhp)
Porsche Cayman GTS 718 2.5L Manual (365 Bhp)
Porsche Cayman GTS 718 2.5L PDK (365 Bhp)
Rennline Tuneable Semi-Solid Engine Mount is the ultimate upgrade for Porsche 718 owners seeking improved performance,
precision, and adjustability. Designed to replace the compliant factory
rubber mounts, this system dramatically reduces unwanted engine movement,
delivering sharper acceleration, enhanced handling, and a significantly
improved shifter feel.
Perfect for both street and track use, this is a versatile, fully tunable solution that allows you to configure your Porsche’s performance exactly the way you want.
Key Features
- CNC
Machined Billet Aluminium Construction – built for strength,
precision, and durability.
- Tuneable
Inserts – includes three pairs of polyurethane inserts in
different densities:
- Yellow (65A) – softest, for daily driving comfort and reduced slop.
- Blue (75A) – balanced stiffness for aggressive street and light track use.
- Red (85A) – stiffest, designed for full race applications. - Nine
Possible Combinations – mix and match inserts to fine-tune mount
stiffness for your driving style.
- Improved Driving Feel – reduces engine slop, prevents missed shifts, and increases drivetrain responsiveness.
- Street or Track Ready – softer inserts preserve comfort, while stiffer ones maximise control under racing conditions.
Why Replace Your Factory Engine Mounts?
Factory Porsche engine mounts use compliant rubber that
softens over time, causing:
- Excessive
Engine Movement – leading to sloppy acceleration and handling.
- Reduced
Shifter Precision – missed shifts or vague gear changes.
- Inconsistent Performance – especially under high load or during spirited driving.
Upgrading to the Rennline M143 semi-solid mount eliminates
these issues, transforming your Porsche with sharper responses, stronger
acceleration, and improved driver confidence.
Benefits of the Rennline M143
- Customisable
Performance – nine stiffness options let you tailor comfort and
control.
- Motorsport-Inspired
Design – ideal for both road cars and dedicated track builds.
- Enhanced
Longevity – billet aluminium body and durable polyurethane inserts
last far longer than factory rubber.
- Confidence in Every Drive – Rennline products are built by Porsche enthusiasts for Porsche enthusiasts, ensuring quality and excellence.
Upgrade your Porsche 718 with the Rennline M143 Tuneable Semi-Solid Engine Mount – the most adjustable, performance-focused mount available, giving you the freedom to tune your car for the street, the track, or anywhere in between.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
M143
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
Fits:
Porsche 996 1997-05
Click 'Zoom in' for large parts diagram.
Diagram Ref No 2.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99337504908
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) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
This is a hydro-elastic (fluid-filled) engine mount. It replaces earlier part numbers including 99337504905 and 99337504907, and is suitable for installation on either the left or right side.
Sold individually, two required per vehicle
Fits:
Porsche 993 (911) C2 1994 - 1997 (not Cabrio)
Porsche 993 (911) C4 1994 - 1997
Porsche 993 (911) C2S 1994 - 1997
Porsche 993 (911) C4S 1994 - 1997
Porsche 993 (911) TURBO 1994 - 1996
Porsche 996 TURBO 2000 - 2005
Porsche 996 GT2 2001 - 2005
Diagram Ref No 2.
Why Replace It, Engine mounts are crucial for:
• Locating and supporting the engine
• Absorbing vibration and engine torque under acceleration, braking, and cornering
• When this mount deteriorates or fails, you can expect, Increased vibration transmitted to the cabin, steering, or pedals
• Clunks, bangs, or loud noises during acceleration, deceleration, or gear changes from engine movement against the chassis
• Visual signs such as leaking black fluid from the mount, sagging of tailpipes (due to dropped mounting), or visible damage to rubber or metal components
Common Failure Causes:
• Age-related rubber degradation: over time, rubber hardens, cracks or de-bonds, causing loss of damping and allowing engine movement
• Fluid leakage (hydraulic version): loss of damping fluid due to seal failure accelerates failure
• Fluid contamination: oil, coolant, or other contaminants degrade the rubber material
• Vehicle abuse or stress: aggressive driving, hard launches, or previous accidents can warp or break mounts
• Worn or cracked brackets: even if the rubber is intact, the aluminium bracket can be damaged or corroded, reducing effectiveness
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99337504909
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
Fits:
Porsche 996 C2/C4 1997-05
Click 'Zoom in' for large parts diagram.
Diagram Ref No 1.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99637501107
The product you are viewing cross references to these numbers