The GM High Energy Ignition (HEI) self-contained distributor and coil package is a slick upgrade for any small- or big-block Chevrolet engine over a breaker point ignition. But the HEI does suffer ...

The firm side boasts a 1-inch copper-gel memory foam later and a 1.5-inch layer of max airflow support foam in addition to the coil system. The mattress cover is made of soft, breathable fabric ...