Small-Block Chevy Heads
The Trick Flow DHC 175 small-block cylinder heads available through Summit Racing Equipment are “trick,” all right. From the outside they look stock, with straight spark plug holes, raised markings on the ends, and optional drilled accessory holes. Inside, though, the heads feature CNC-ported intake and exhaust runners, 60cc combustion chambers with blended bowls, 2.02/1.60-inch intake/exhaust valves, and a choice of single or dual valve springs for up to 0.600 inch of maximum lift. Heads come fully assembled, but it’s up to you to add the stealth paint job. Information: Summit Racing Equipment, 800/230-3030, summitracing.com.