Modern, Traditional and Classic & race car suspensions.


Updated May 19th  2021


5. RS Front suspension with progressive spring rate and tuned SPAX adjustables (or Bilstein monotube dampers only if available).

This  system is a direct exchange of springs and dampers. Provides much improved ride comfort, more progrssive handling and less roll.

Will fit all traditional Morgans from 1952 to the last of production in Spring 2020.

Approved by Morgan Motor Company and available from SSL or any Morgan dealer or specialist World Wide. See the links page on this website.

Takes up to 3 hours to remove old system and fit the RS.


Price £595 plus fitting & VAT & delivery. SPAX adjustables tuned for this system now standard fitment.  



6. SSL 5L Rear suspension with progressive spring rate and tuned Spax adjustables.


New Mk2 with aluminium axle brackets and black powder coated steel frame - better corrosion resistance and looks fantastic!


Completely replaces the leaf springs with a bolt on system with no welding and limited drilling on older cars. Available for wide and narrow chassis cars.


Benefits include, progressive spring & roll stiffness, better ride, less roll, ride height adjustable.


These are the suggested retail prices but your dealer will discuss with you price to fit. Fitting at least one day plus removal of the leaf springs.


SPAX [twin tube adjustable] £2900.00 plus VAT & Delivery.


SSL Engineers have worked with SPAX to create the damper characteristics we need for the RS and the 5L to give good ride and handling. Indeed the ride is a good as we achieved with Bilstein and when hardened with the adjuster then the car is well suited to hard work laden or track days.


Photo on the far right shows the installation of SPAX adjustable dampers in the 5L, narrow chassis! The SPAX units still take the twin springs to give a progressive spring rate and are of course also adjustable for ride height to suit all the different models, though rear axle loading is not that significantly different between the models.

SCROLL DOWN to see all the products.

8. SPAX dampers for 'Rutherford rear tele conversion on Morgan. A Morgan driver wished to exchange his Koni rear dampers fitted to his Rutherford tele conversion on his 1954 +4 with new tuned SPAX adjustable dampers. Based on SPAX experience with the lovely Morgan ARP4 and the SSL with the 5L and other Morgan rear suspension projects SPAX built in a damper setting that suits the car very well.


"The Spax shock absorbers are a vast improvement on the Koni Classics.  The quality of the ride overall is far better.  In particular the jarring on bounce is eliminated. The Plus 4 is now giving a superior ride."


Note to ensure supply of the correct damper length the customer is requested to measure the damper eye to eye length with the rear of the car jacked up and the axle sitting on the rebound rubber that is screwed to the chassis below the axle.  


Also note that this car was also fitted with the RS front suspension system that suits the car very well, despite having a 2.1 litre cast iron engine up front.


Price around £100 each +VAT


9. SPAX Rear adjustable dampers for Morgans.

SSL have worked with SPAX to develop the settings of our own specification of rear dampers that will directly replace dampers that bolt to the cross car 'damper hoop'. These will complement the RS (Refinement System) front suspension and also work well with the standard front suspension. These are different settings from those sold by the Morgan factory and their dealers. The settings have made the most of what we have learnt on road and track by tuning damper settings for Quantum and Bilstein on Morgans.


Price around £200 a pair plus post and VAt. Please ask for a quote.

11. Discs for friction dampers for Morgan 4/4 Series 1.

No stiction, thus now allows the suspension to absorb road surface degradations and flow over undulations, significant improvement in ride and handling.


SSL will supply discs to pattern or dimensions.

rs front
SSL RS Demo stand
early 44 narrow 5L

7. Panhard Rod for leaf sprung Morgans, new unique design.

This replaces the U bolt plate under the leaf spring so does not clamp onto the leaf spring as the clampo affects the leaf spring compliance.


The Panhard cross member is there to ensure that the side loads that the rod takes are distributed to both sides of the chassis; this is actually the cross member used on the SSL 5L rear suspension system.


Currently only available for the 2 seater and the 4 seaters that do not have the battery behind the axle. Ask first.

Available from Morgan dealers and specialists such as Librands

Suggested retail £175 +VAT.

ssl panhard for leaf1 - Copy
ssl panhard for leaf2 - Copy

Design - Source - Test - Supply - Develop - Tune................. for Road and Race!

Leaf springs ~ Coil springs linear & progressive ~ Telescopic dampers ~ Friction dampers ~ Lever arm dampers, adjustable valves

4. Morgan Roadster and ARP4 

Progressive spring stack for Morgan's five link rear suspension, to give comfortable ride yet then stiffen up with two up and lots of essential luggage for a blat down to Provence or a fling around the Highlands!

Same spring rate and damper curves as SSL's own five link suspension system!

plus 8 front & rear
roadster stack

2. Front and rear coilovers for Aero8 and its Plus8 derivatives. Series 2,3, & 4

New adjustable damper settings for more comfortable ride and better handling.

Refined spring rates. Makes the car into a comfortable and fast true Grand Tourer, ideal for two on long distance trips.


3 . Front and rear coilovers for Aero8 and its Plus8 derivatives. Series 5.

Series 5 is new product, coilovers with adjustable damping and ride height plus a softer rear ARB to give improved ride over poor surfaces in town but still able to control roll when 'pushing on'!

Armstrong lever arm adjusable valve

10. Adjustable valves for Armstrong lever arm dampers.

These are a straight exchange for the standard valves. SSL will flush your old units, fill, bleed and fit the new adjustable valves. Adjustment is with a 8mm hex.

SSL RS & 5L testimonial

Products include:

1.   Coilovers for PLUS SIX.

2.   Coilovers for Aero8/Plus8 Series 2/3/4

3.   Coilovers and new rear ARB for Aero8/Plus8 Series 5, the last of the Aeros!

4.   Coilovers for Morgan's five link Roadster & ARP4, adjustable damping & ride height.

5.   RS Front Suspension Refinement System for 'Classics'. Improved ride and handling, adjustable SPAX dampers.

6.   5L Rear Suspension Five Link. Wide & Narrow chassis.

7.   NEW Panhard Rod for leaf sprung Morgans, not clamping around the leaf spings!

8.   SPAX adjustable dampers for Rutherford rear suspension.

9.   Rear SPAX adjustable dampers with bump stops, direct replacements.

10. Adjustable valves for Armstrong Lever Arm dampers.

11. Discs for friction dampers with no stiction.


ROAD TEST RS & 5L - at bottom of page.

SSL cream discs
GP 4 4 S1  rear friction dampers re disced

What is being said about SSL Morgan RS & 5L by satisfied customers



3.7 Roadster

The system is very well made and fits so neatly under the parcel shelf. I have the RS kit fitted up front with slightly tweaked damper settings

I drove the car hard over many miles of open roads I know, including hills and bumpy bends. It has really transformed the car's ride and handling, truly impressive. The rear suspension will now absorb speed bumps with no crashes or jolts, but more importantly is how well it copes with bumps at speed and its ability to put down the power on fast bumpy corners up hill and down. I am so pleased.


+4 Duratec

Trip to Corsica and back: Very impressed, the ride is certainly improved and much smoother. The rear was much better, coping with most that even rough roads in Southern France could throw at it. On smooth roads the handling was a revelation with much better turn in. In spite of a heavy case the prop shaft never hit the transmission tunnel (unlike with the old set up). Bump steer was also minimised, certainly much better than with the old front and rear set up. In spite of driving fairly hard there was never any time that the rear did not feel very secure.


3.0 Roadster

All good. I have done 800 miles including a week in France, 2-up with luggage, and a trip up a cart track courtesy of the Satnav! Handling is much better with precise turn in and it goes where you point it. It stays on line well with only severe bumps causing any waver.  This is much improved. No axle tramp or tyre squeal on acceleration.  The ride is much better, not hitting bump stops and the same loaded.



+4 Duratec

Tested on the road we found the behaviour is significantly better, especially with bumps in the corners and changes of direction.  The impression is that it has much more adherence, even on the wheel that is not under load.



Roadster 3.7

The 5L harmonizes quite well with the “upped” power/torque of my 3.7 - no tramping, no sidestepping even with “full load” applied.

A revelation!  Absolutely NO question about the RS, this seems a “must” to me, for each and every trad Morgan – it´s a no-brainer to me!

Comfortable the whole mods are indeed – almost to the point of me thinking “can it be this is still a trad Morgan i´m charging along in?”

So full recommendation for both the RS and the 5L system from my side – I do not regret the work and money spent on it!

NEW Suspension enhancement for Morgan Aero/+8 Series5 and PlusSix.


1. NEW NEW NEW! Front and rear coilovers for PlusSix

Suspension upgrade to make this great high performance car more driveable! Don't be scared of the corners, they will now be fun, we insist!

Offers increased comfort for long fast trips but also more progressive handling when using all that lovely BMW straight six torque and power!

Adjustable damping but fixed ride height to meet some countries' TuV & EU requirements plus a progressive anti-roll bar characteristic to improve low speed ride and handling.

Contact SSL direct for this upgrade 01246 558062 or 07764 995996


P7193121 - Copy
SSL adj valve white - jpg
IMG_1406 - Copy
flipped - Copy
FB7A0586-8425-40FF-8038-BDC801161455 - Copy

What are the main differences you have found?    The overriding change has been all about comfort, the car is just a delight to drive and feels so much smoother at the front than any other Morgan I have driven. I have had 5 Morgans of my own and driven dozens of others as I had a very busy kingpin replacement business a few years ago. I no longer cringe and grip the wheel in anticipation when I can see poor road surfaces ahead!


Does it affect the feel of the car?     It depends what you mean by ‘Feel’, that’s a hard one to quantify as many owners will feel, or not feel, different things from their cars. What it does not do is in any way take away the sensation of driving a Morgan, that classic experience of involvement, in fact it enhances it as you no longer drive with one eye looking out for potential problems, with the SSL RS fitted the car can handle what the environment throws at it.  We can't ignore the fact that the suspension and steering design if from another era but that motoring, roads and speeds have evolved. The biggest change of all has been in tyre development and I feel that the standard Morgan set up has not kept up with improvements in grip or comfort levels and the SSL RS goes a very long way to addressing this. The car over long distances is considerably less tiring as driver fatigue is reduced as its possible to relax more and enjoy the environment.


How does the car track over ripple effect road surfaces?     This is where the biggest changes will be noticed, when driving with others in their Morgans you can observe their bonnet lines moving up and down at a high frequency over ‘ripple’ road surfaces, the SSL RS simply irons out these undulations, its very noticeable on any in car video that may be filmed as the car is just not bouncing like before.  ‘Nodding Dog’ syndrome is a thing of the past.


How does the RS affect the roll stiffness?    This is an area that gave me cause for concern prior to driving the car, I had expected (wrongly as it transpires) the car to have excess ‘roll on turn in’, the roll in a 2012 4/4 Sport is no greater than a none equipped car.  I have driven a few +8’s with wider tyres and obviously heavier engines and it is more pronounced with those vehicles but only marginally so. To put it into context if you observe the outer wing top on a fast bend and turn in late and hard you can see the wing initially dip, probably by no more than 20mm then it stops as the "Rate Riser" spring comes into effect. On lighter cars this phenomenon is not apparent and anyway it can be corrected simply by a slight adaption to driving style, turn in a few yards earlier and more progressively (smoothly!) and there is no more roll than normal.


What is it like on rapid directions changes like negotiating fast roundabouts?     Very compliant, I spent many years involved in motorsport and so tend to push a car harder than normal through corners, probably more than I should, and the front is so compliant and manages to dial out the inherent understeer that the standard car is known for. I have just (Summer 2020) returned from a 1,000 mile trip around Scotland and on some of the mountain passes the car never once ‘lost’ its front end grip, no understeer on power or trailing throttle and direction changes were smooth and predictable.


Is the car comfortable over rough broken road surfaces?     Very much so, the inherent crashing

and banging from the standard suspension is gone, less jarring and fatigue for the driver and passenger.


Is the steering any lighter?     I think its about the same as later cars with MMC fitted steering bearings,

the steering input feels very similar to OE both in terms of load and steering angle.



Colin has 20+ Years of Morgan Ownership including the mighty Plus8 and has experienced many Morgan 'upgrades'.


Career wise Colin has five decades in the motor industry.

Fellow of the Institute of The Motor Industry

Chartered Automotive Engineer

Former Jaguar Cars Experimental Department Test Driver

Former Volvo Car Corporation European Technical Training Manager.


Below is Colin Jones' appreciation of the SSL (SUPLEX as was) RS Front suspension Refinement System on a recent Morgan 4/4, used on a variety of roads and levels of assertiveness!


+6 logo oncar photo


SSL 5L mk2 low view
for www

Double click to insert body text here ...

Installation instructions, click on the links to the left to open the PDFs that you can then view, download and print if you need to.









Left, RS 'Refinement System, for the front suspension to increase ride comfort, more consistent handling and more enjoyment.









Below left, installation instructions for the 5l 'Five Link' rear suspension that replaces the leaf springs with five links and coil overs, so coil springs on adjustable dampers.







Left, Mk1 with steel axle brackets. No longer supplied but support still given.





















Left, Mk2 with alloy axle brackets and black powder coated steelwork. This is the currrent specification.

Should the above link to YouTube not work then: here is the direct link to YouTube, just copy and paste into your browser


Or click on this link      SSL5Lvideo