'79 Pace Cars, '80-'81 Cobra's and '82 GT's with the Recaro seat option. They also came on all '83 GT's and I believe the '84 GT's as well. The '83-'84 GT halo's with the nets had the single bar setup like the '85-'86 GT halos while the Recaro seat halo's had a two pole setup. Hope this helps.