I had the KW Variant 2 shocks on my 09 when I bought it used. The original owner wanted to lower the car for looks, and these were the least expensive solution at the time.
While they never gave me a good ride, and felt like they used very little shock travel, I had them readjusted several times, but still disliked the pogo stick ride.
I had always wanted Motons, as they were the gold standard, along with Penske.
Was reluctant to give up the very expensive KW shocks as the Moton and Penske solution was over $6,000 installed.
I finally gave it up, after almost being put into the wall at Willow Springs Raceway. The pogo stick ride I got with the KW and the very limited wheel travel had me with little control at the track.
When Woodhouse unveiled the new Motion Control Systems MCS (Old Moton guys) single adjustable I was ready to make the move. At just over $3,000 they were back in the budget.
The difference was immediate and amazing. That Pogo Pogo Pogo ride was gone. The Viper now had that elusive planted feeling. You felt tied to the road. You could feel the wheels using much more of their range of travel. Soft bumps and botts dotts were far less noticible, and over bigger bumps the car remained level. You were no longer launched into the air. Even though the springs were much firmer they felt much softer. The shocks were free'd up to move where the KW just seemed to lock up and road like a rock in comparison.
These MCS shocks drive so much smoother they are not even in the same league. The Viper is much less darty, and goes straight down the road. Blasting off a corner is much better controlled with none of that skating feeling you get with the KW's.
These shocks are a quantum improvement is comfort and control.
As a side bonus, I had an annoying "knock" from my rear end. Spent lots of hours trying to track it down. Tightened everything to spec, greased everything, check sway bars, rear end torque, it never went away. As soon as I removed the KW's the knock went away...so that is where it was coming from.
I had Todd at A&C do the install of the new MCS's as they were the first he had seen. Think he also was really impressed at the difference between the two premium shocks.
These new MCS shocks are not their double adjustable with remote resevoir models, but the newer street version that is single adjustable and no resevoir. Like the KW they can be easily height adjusted without needing to be removed from the car, and also provide an easy way to corner weight the car for better handling, or lowered for a better look.
Lots of people have been ordering their Gen V SRT Vipers with these new MCS shocks to replace the ones that come with the car stock.
Like many others I had previously thought of the KW's as a big upgrade from stock, but for me the MCS is head and shoulders the better system.