x2 - Jeff hooked both my brother and I up with our R3's/ I have the Rage and my brother has the Hybrid. Both are the same size but they fit our bodies differently and the one we chose works best for us. The slip in pad with cutout works awesome in our Sparco Tub seats.Can't go wrong with Jeff and the guys at UPR. That is where we got ours, stand up guys and easy to work with. Also they make a good number of our races here in Cali and Nevada.