The pistons are JE products, and don't let the big domes fool you. While these are not the pistons headed in to the Challenge entry, they're a very similar design, minus the high domes. The pistons Nelson has chosen are flat-top forgings, and come ready to accept the .990-inch Chevy pin (at 2.930-inch length), and they'll see some work on the bench before being put to work under the heads. "I'm going to have lateral gas ports drilled, and I'll run standard-tension D-wall oil rings, which will be Calico coated. I'm not going to mess with the low tension rings like I did last year. Without a vacuum pump in place to help them seal, we saw some oil in the chambers when we tore last year's engine down. We don't feel the gains in minimizing ring friction are worth the potential losses in ring seal, so we'll up the tension a bit to ensure no blow-by."