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Engine mounts

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M143
Product Information
Product Information
Tuneable engine mount set.
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 


Rennline Tuneable Semi-Solid Engine Mount is the ultim
ate 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
982199131B
982199131C
982199131D

The product you are viewing cross references to these numbers
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About Engine mounts

Porsche Engine Mounts

Enhance your Porsche’s driving experience with the right engine mounts. At Design911, we supply standard replacement and performance-focused engine mounts for Porsche models, helping you balance refinement, control and durability for road, fast-road or motorsport use.

Why do Porsche Engine Mounts matter?

Engine mounts support and locate the engine in your Porsche while isolating vibration from the cabin. As they age, the rubber or other materials can soften, split or sag, allowing more movement than intended. This can lead to increased vibration, driveline clunks and a less precise, less refined feel from the car. Choosing suitable replacement or performance mounts helps keep the drivetrain controlled and the car feeling tight and well looked after.

  • Maintain correct engine position and support within the chassis
  • Help control vibration and harshness transmitted into the cabin
  • Reduce unwanted engine rock that can stress exhausts, hoses and joints
  • Allow you to tune the balance between comfort and a more direct, connected feel

Common options & kits

Individual replacement mounts
Specific engine mounts supplied individually so you can address a particular failed or tired mount without changing the entire set.

  • Useful when only one mount is clearly worn or damaged
  • Lets you focus on problem areas first
  • Can be combined with existing good mounts to spread work over time

Matched pairs or axle sets
Mounts supplied as pairs or sets intended to be replaced together, so left and right (or multiple) mounts are renewed at the same time.

  • Helps keep engine support and movement consistent side to side
  • Reduces the risk of one old mount accelerating wear in a new mount
  • A sensible approach when original mounts are of similar age

Performance and motorsport mounts
Uprated mounts designed to limit drivetrain movement more than standard parts, often using stiffer materials such as polyurethane or metal components.

  • Intended to reduce drivetrain wind-up and slack for a more direct feel
  • Can support fast-road or motorsport-focused Porsche builds
  • Typically increase noise and vibration compared with OE-style mounts, so choice should reflect how the car is used

Brands available in this category

For this category we stock a wide choice of trusted brands for Porsche models. You can also browse and filter by brand on this page to focus on your preferred manufacturers.

  • 9products – Precision-engineered Porsche performance parts including engine and transmission mounts, often aimed at club motorsport and track-day builds, using high-grade aluminium and motorsport hardware.
  • Demon Speed – Track-focused components for aggressive setups where owners want a more focused feel; suitable parts may increase noise and vibration so are best matched to performance-orientated cars.
  • Function First Performance – Known for drivetrain and shift-feel components, including engine mounts that target a tighter, more consistent response under load with careful attention to driver connection.
  • OE Match – OE-equivalent replacement parts aimed at maintaining original specification and reliability with sensible running costs, ideal where you want standard Porsche refinement.
  • Powerflex – Polyurethane solutions for related chassis and mounting areas, chosen when owners want more consistent geometry and control than ageing rubber, with compounds to suit road or track bias.

When should you review or replace your Porsche engine mounts?

Checking Porsche engine mounts periodically helps you catch age- or use-related deterioration before it affects refinement or starts to stress other components. Mounts work hard under acceleration, braking and gear changes, so wear is common on older or heavily used cars.

  • You notice excess vibration at idle, especially compared with how the car previously felt
  • There are clunks or thumps on take-up of drive or during gear changes
  • The exhaust or other components can be felt or heard knocking under load
  • Visual inspection shows sagging, perished or split rubber in one or more mounts
  • You are carrying out engine-out work, restoration or performance upgrades and want a fresh baseline

If any of these apply, it is a good time to review your engine mounts and replace anything that is past its best so your Porsche stays dependable and enjoyable to drive.

Explore Porsche engine mounts with Design911

Browse engine mounts for Porsche at Design911 – from OE-style replacements to uprated and motorsport-orientated options – and find solutions suited to daily road use, fast-road upgrades and full track projects. Our team can help you select parts matched to your model, year and intended use so you strike the right balance between comfort, control and durability.

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