Modern, Traditional and Classic & race car suspensions.

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Last updated 17th January 2019


Lamborghini Diablo 1997; replace coil overs with slightly softer springs and retuned dampers but with new aftermarket ride height system for the front.

New front springs custom designed to fit the front GAZ dampers and the nose lift system.

Ride height system will lift nose of the car by about 50mm to clear speed bumps.


The Lamborghini nose lift system development is completed. It is installed on a 1999 Diablo. The system is stand-alone so does not rely on the power steering pump pumping up the dampers to achieve a nose lift. This car has also been fitted with new adjustable dampers and slightly softer springs to offer a better ride yet still give the handling required. Road testing completed, ride much better and handling still sharp. Easy to adjust the damping settings. Work done at Thornley Kelham. The system is believed to also fit the Murcielago that followed the Diablo. If wish to know more then contact us!

Video available - please ask for a copy!



1950's Citroen Traction Avant 15C preparation of the suspension for long distance Classic Rallies.


This is the 6 cylinder 2.7 litre version 1939 (model built 1938 to 1956)


New GAZ dampers tuned for the application.


Calculations on new Torsion bars and source suppliers of new items.


Recently successfully completed the 2017 'Winter Raid', the new GAZ dampers worked well and coped with the snow, ice, gravel & fast road stages.


Gives a great ride and improves the handling on normal roads. These dampers will be available for all Citroen Traction Avants to replace the standard items or the Classic Konis! Contact SSL.

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Tatra T77 Suspension stability project. Owner wants to control the rear wheel tuckunder on hard cornering  to make the most of the lovely V8 classic supercar!




Castle Three prototype suspension advice. A new three wheeler being developed in Alnwick, SSL provided general advice on suspensin design for a three wheeler based on experience with the Morgan Three Wheeler.



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Morgan race cars. Set progressive spring rates front and rear using SUPLEX race pack of a range of spring rates. Set rebound spring just free.


Tuned Quantum double adjustable dampers on class winning 4/4 and new season Plus8.


Products include:

Lamborghini Diablo 1997 nose lift system, GAZ dampers and softer springs.

1930's Citroen Traction Avant new dampers for long distance rallies.

Morgan 4/4 Race Car springs and dampers.

Morgan +8 Race Car springs and dampers.

Tatra Suspension investigation for improved handling

Castle Three - three wheeler.


Previous projects - scroll to bottom - high performance off road!

SCROLL DOWN to see all the projects.

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British Steam Car Company.


Dan provided suspension support to the car, including spring design through SUPLEX.




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Specialist spring design to give progressive rate with a single spring. So complaint ride lightly loaded but will stiffen up with extra crew or load to give same compliant ride.

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2009 Dakar Rally.

Alistair McRae's Enduro car

Progressive SUPLEX springs, a pair of springs in series to give compliant ride but able to take high impacts such as landing after big jump!

Leaf spring design for Sanata imported by Fourtec. Use of single leaf composite single leaf springs to give large articulation, lightness and durability.

SSL are still working with Jon Crocker, the exMD of Fourtec, on new leaf springs for classic cars including Morgans!

Fourtec test 024 Fourtec test 026 Citroen TA Baltic Rally 2017 with GAZ cropped ride height