The front upper bracket was then welded in place for a factory-like fit and appearance.
Loving It
Have you ever wanted to go really, really fast on a bumpy road? Have you ever gone really, really fast on a bumpy road and almost lost control of your rig after being violently tossed around because your suspension couldn't handle it? I have. I even rolled it over one time as a result. While many of the available aftermarket suspension systems are up to the task of tackling extreme terrain at low speeds, only a handful of them offer such capability at a higher rate of speed. Those that do incorporate a coilover suspension configuration in the front of the vehicle, but for the most part the rears retain the factory design and simply use taller springs and shocks. With the Poly Performance system replacing the rear setup, as well as the front, with a coilover shock, the resulting off-road driving capability is very impressive.
High-speed off-road driving ability isn't the only benefit. Low-speed crawling also gets a boost. In fact, with the increased flex provided by the Poly Performance kit, we were able to climb many obstacles while still in 2WD.
The front lower mounts were welded to the axletube over the stock shock mounts. | 
The front bumpstop mounts and gussets were mocked in place in the factory upper coil spring and bumpstop mount. | 
The rear bumpstops and mounts were mocked in place along with a bumpstop plate on the axle. Here, the bumps are shown in place with the suspension fully compressed. |
With its placement accurately determined, the lower bumpstop plates were welded to the axletube. | 
The rear shocks and Eibach coil springs were then installed. | 
The rear bumpstop mounts were reinforced with gussets to the frame. Fifteen-inch limiting straps were also installed. |
Here the SAW 3-inch-stroke air bump and mount are shown installed along with the SAW RaceRunner remote-reservoir shock and dual-rate Eibach coil springs and coil tender. | 
The rear SAW shock and Eibach coil springs are shown installed along with a 15-inch Poly limiting strap. We'll switch to a longer rear limiting strap if we install a tri-link option to our RE long-arm suspension system. | 
A coilover hardware kit was used to secure the coil springs in place on the threaded shock body. The kit includes a bottom cup, coil slider, dual-rate stops, and an adjuster nut. Here, a spanner wrench is used to lock down the stops after adjusting the ride height. The adjuster can be moved up or down to make the shock shorter or longer. |
We obtained a great deal of positive wheel traction through the installation of coilover shocks. We were even able to climb some obstacles in 2WD that would have previously required 4WD. | 
We stretched the TJ's legs quite a bit while testing the new Poly Performance suspension system. The new coilovers are a great aid in adjusting ride height to accommodate various tire sizes. | 
With nearly a foot of droop showing on the driver side, the TJ's body still appears to be sitting level. The coilover shocks provide compression and extension as needed without the harshness of traditional spring and coil arrangements. |