It may make a small difference if the rest of your suspension is set up properly and dialed in, a few being a couple hundreths or so. Nothing huge at all. However, if you've never been to the track before, chances are you are not going to notice the slight changes in shock valving, weight transfer, and suspension movement to say it makes you faster. If you are actually competing, the consistency provided by the bar is going to make the car a whole lot more predictable and fun to drive while you familiarize yourself with the cadance of the lights, the way your car moves and reacts, and getting a feel for its attitude under power. You will notice that you are going to get quicker and quicker each time you go out as you get different aspects of the car sorted out and your engine gets run in. Once you can get the car stabilized and repeatable in the e.t., then start playing with adjustments to shocks, spring clamps, sway bars, tire pressures, roll out, etc.
