The 240 has a solid rear axle and a five-link suspension system. One of those links is the panhard bar, which bolts to the body at one end and the axle at the other. It runs from side-to-side. It locates the rear axle in a vertical plane across the back of the car. What this means is that the rear axle moves side-to-side slightly as the suspension compresses and rebounds. If you crawl under your car and look around it's pretty obvious.
If you lower the car without shortening the panhard bar in any way, it will hold the axle off-center towards the passenger side of the car.
The torque rods are the same story, just front-to-back. IPD has sold a boatload of both over the years because everybody looks at these cars and thinks they need to get lowered.
Kaplhenke sells version of both as well.