There are basically 2 types of shocks being sold, twin tube and monotube shocks.
Our DDMWorks shocks and the QA1's (which have been branded as HAHN,Twist,etc) are twin tube shocks. Twin tube shocks are less expensive to manufacture, hence the lower price point that you will see with twin tube setups. Most OEM shocks on cars are twin tube shocks since they offer generally a good ride at a lower price point. A twin tube shock has essentially 2 tubes inside, with the piston moving through one of the tubes and the fluid inside the shock able to move around and into the other tube. The downside is that the piston area on twin tube shocks is relative small when compared to a monotube shock.
The JRI, Bilstiens and Ohlins setups are monotube shocks. Monotube shocks are what you will find on most performance cars from the factory and most performance aftermarket shocks. Monotubes are just a tube with a large piston inside, which allows for better control of the movement of the shock than the twin tube setup. Generally monotube shocks are also gas pressurized also (some twin tube shocks are gas charged also). If you are doing racing the Monotube will offer more consistent damping and better control, however at a higher price.
Our shocks are not manufactured by QA1, we found another manufacturer that is able to offer Slingshot specific damping and several other upgrades over the QA1 shocks and is the reason we chose to go with them for our setups. We also designed our setup for the majority of the customers we have met over the years now with the Slingshot. Most customers we have talked to want a setup that is nice and comfortable for long drives and cruising, but has the option to be sporty if they want to go play for the day. Also, price is always a big consideration with customers looking at shocks and that $1000 mark seems to be the price point most are willing to pay for a good setup.
For comparison, we have driven every suspension option out there at this point (except the JRI hydraulic height adjustables, I have never seen those yet). For around the $1000 mark you have our DDMWorks shocks, the QA1's (HAHN, Twist), Bilstein and the single adjustable JRI's. The JRI and Bilsteins are monotube shocks and definitely work well, offer height adjustability, but no control of the damping. I would probably say the JRI's are a little more comfortable than the Bilsteins, with the Bilsteins having a little better handling (higher damping) than the JRI's. The QA1's and our DDMWorks shocks both are going to offer height and damping adjustability at that price point and if you are not tracking the Slingshot heavily, the advantage of the monotube over the twin tube shock is not something you will notice. The specific damping of our DDMworks shocks over the QA1 shocks is definitely noticeable and ours can be set to a very comfortable ride or pretty sporty. I know it is not a surprise coming from us, but our shocks are definitely a better performer than the QA1's at the same price point. There are starting to be a good amount of the sets out there, people like @MACAWS has had both sets and can probably give some feedback here also.
Once you get above that $1000 price point, you get into the JRI double and triple adjustables along with the Ohlins. They are great performers, with the Ohlins basically the best handling setup for the Slingshot there is, but also the most expensive.
That is a quick explanation, let us know if there is anything else we can answer, back there working on the turbo kit today
Dave
- Also here is another quick explanation about twin tube vs. monotube -
KYB Americas | The Differences Between Monotube & Twin-tube
Pros and cons of monotube and twin tube -
Monotube Vs Twin-Tube - What is the Difference? What is Better? - ISC Suspension