On the street, it’s difficult to say that there is a noticeable difference from the Steeda Extreme G-Trac K-member brace. Unlike the Steeda’s Stop The Hop Package for the S550 Mustang GT, which was substantial in the first few hundred yards of driving the car. If anything, there may have been a minute improvement in chassis stiffness when driving up steep driveway inclines, but short of this extreme twisting of the chassis at very low speeds, I can’t say in good conscious that there is a subjective improvement. On the otherhand, even when driving up extremely steep driveways and through deeply rutted off-road parking lots, there have been zero witness marks or contact from the 1″ loss of ground clearance due to the front of the K-member brace.
Overall, we respect Steeda’s engineering and have been a fan of many of their products. The purpose of the brace tying the open area at the rear of the subframe is a very good one. They also offer a 2-point G-Trac Brace for an even lower price point. However, the K-member brace did not deliver a difference in seat of the pants feel to the already stiff S550 front subframe on stock suspension. That’s not to say that we wouldn’t notice an improvement if the car had coilovers and wider slicks, but for a street car that’s tracked on stock width tires on stock suspension; the benefit of the brace will not be one that gives you a change in feel to a relatively stock car. Steeda uses this K-member brace on their Q500 Enforcer track package that I drove and felt was very well built, performed extremely well and put down some impressive lap times; so it’s a contributing factor to a car built to those standards, but I wasn’t able to feel much of a difference on a stock car.