On a smooth road course most will agree that there is no real advantage to IRS. On the street with a properly setup IRS you can have an advantage mainly due to the road inconsistencies and the IRS's ability to compensate with each wheel "independently". They are much more difficult to make work with a high horsepower car however, not to mention much more expensive.
A properly setup solid axle is generally very difficult to beat both in cost effectiveness and simplicity. There are many options out there but it's hard to beat our
Torque arm Suspension when it comes to ease of installation, included options, and overall usability. Because of the centrally located main link, a torque arm works similarly to a 3 link design when it comes to bind-free axle articulation. The torque arm acts like a ladder bar in preventing axle counter-rotation and maximizing weight transfer except without all of the negatives associated with ladder bars. Our kit is 100% bolt in wether you are using a 10 bolt, 12 bolt, or Ford 9", no welding or fabrication required.
If you have any questions, please feel free to contact any of our knowledgeable sales staff at 813-986-9302.