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- 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 Boxster 987 MKII 2.9L 2009-2012
- Porsche Boxster S 987 MKII 3.4L 2009-2012
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12

Fits:
Porsche 986 Boxster
Porsche 987 Boxster
Porsche 987 Cayman
Simple and easy upgrade to failing OE transmission mounts. Perfectly balanced without compromising on the comfort and noise in the cabin.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
3609309627
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 Boxster 987 MKII 2.9L 2009-2012
- Porsche Boxster S 987 MKII 3.4L 2009-2012
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12

SET OF 2
AVAILABLE FOR
Porsche 986 Boxster and 987 Boxster / 987 Cayman
FITS MODEL VARIANTS INCLUDING MK.1 & MK.2 with 6 Speed Manual or PDK Transmission.
• The RSS Tarmac Series Performance Transmission Mounts are designed for the Porsche driver who demands the absolute maximum in precision handling, feedback and control from their chassis.
• With factory Transmission mounts, the drivetrain will move independent of the chassis during acceleration, deceleration and cornering loads. This movement can upset the balance of the vehicle and create negative handling effects.
• RSS Performance Transmission mounts minimize these effects by utilizing specialized polyurethane bushings which offer a firmer, more direct driving feel with optimum feedback.
• This upgrade will NOT significantly affect ride quality or cause knock sensor issues commonly associated with solid transmission mounts.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
627
The product you are viewing cross references to these numbers
Porsche Engine & Gearbox Mounts - Performance Drivetrain Control Upgrades
Engine and Gearbox Mounts are critical drivetrain components that secure the engine and transmission to the chassis while managing torque reaction, vibration, and movement. In performance-focused or higher-mileage Porsche vehicles, upgraded mounts help maintain correct drivetrain alignment, improve power delivery, and protect surrounding components under load.
Available from Design911, this range of Porsche engine mounts and gearbox mounts is designed for tuned, track-driven, and enthusiast-owned vehicles where improved control and durability are essential.
What Do Engine & Gearbox Mounts Do?
Engine and gearbox mounts stabilise the drivetrain while isolating vibration from the cabin.
Core Functions:
- Secure the engine and gearbox to the chassis.
- Control drivetrain movement during acceleration and braking.
- Absorb vibration and torque reaction.
- Maintain correct driveline and exhaust alignment.
- Improve throttle response and gear shift precision.
High-quality mounts are essential for consistent performance and long-term reliability.
Why Do Engine & Gearbox Mounts Fail?
Standard factory mounts are designed for comfort and daily
driving, and can deteriorate over time or under increased load. Common failure
causes include:
- Rubber degradation from heat and age.
- Excessive torque from tuned or modified engines.
- Repeated high-load acceleration and hard gear changes.
- Track use or aggressive driving.
- Oil contamination causing mount softening or collapse.
When mounts fail, excessive engine movement can lead to poor shifting, drivetrain knock, exhaust stress, and accelerated wear of engine components.
Why Upgrade Engine & Gearbox Mounts?
Upgraded performance mounts are designed to handle higher loads while maintaining drivetrain control.
Upgrade Benefits:
- Reduced engine and gearbox movement under load.
- Improved drivetrain alignment and stability.
- More precise gear changes and throttle response.
- Increased reliability for tuned and track-driven engines.
- Longer service life compared to standard rubber mounts.
Upgrading mounts helps protect the drivetrain while enhancing driver confidence and vehicle responsiveness.
Highlights
- Porsche performance engine and gearbox mounts
- Improved drivetrain stability and control
- Designed for tuned, track, and enthusiast vehicles
- Reduced vibration and torque movement
- Essential upgrade for high-output engines