Subframe connectors are not new. They have been around for years. I have installed hundreds of sets on Mustangs. In that chassis, they make a big difference. In a RWD car, when you step on the gas, the car twists because the engine is lifting up on the left front of the chassis. The subframe connectors are made of steel tubing that is welded to the chassis and prevent the twisting that this causes. I didn't feel that the benefits of this would make a big difference in the SHO's FWD chassis. Boy, was I wrong. I was fooling around with mine one day and decided to weld up a set. I installed them and was amazed at the difference they made in the feel of the chassis. I used to be able to wind the motor up in first gear to 4,000 and snap my foot to the floor. The car would respond by immediately spinning the tires and breaking traction. This would last for a while and then finally the tires would hook and pull the car. After installing the connectors, I tried the same thing. The results were dramatically different. This time, when I snapped my foot to the floor, the tires chirped a couple of times and immediately pulled away without loss of traction.

    I remember thinking to myself, "Where the hell did that come from"?

    After taking a look at the engineering aspect of what I had done, it became clear. Since the motor is transverse, when you step on the gas, it lifts up on the core support and pushes down on the firewall. This transfers weight off the front and forces the chassis to bow down in the middle. This is where the weight transfer comes from. When I install the connectors, I use a chassis lift. This induces a bow up in the chassis from lifting the car at points inside the wheel base (there is more car hanging off the ends of the rack). When the connectors are welded into position and the car is put back on the tires, the chassis is preloaded straight. Now, when you put your foot into the gas, the car can't bow down in the middle. This will keep more weight on the front end and keep the tires on the ground.

    There are more benefits than just traction. The car remains flatter, longer in corners, because the chassis can't twist. When you turn the wheel hard, the front wants to roll but the back doesn't. With the connectors installed, the chassis wants to roll together. This keeps the car flatter while cornering. Also, those irritating creeks and squeaks around the back doors and package area will all but go away With the front tied to the back, now those areas can't flex and make noise.

    I have installed a bunch of sets and have a lot of impressive feedback.  Everyone has really noticed a difference and has enjoyed effects of a stiffer, more well balanced chassis.
 
 

Another review of the subframe connectors (with slightly better pictures) can be found on Ken Barney's site.