The Stomper line of rammers now includes three models with 4-cycle engines, eliminating 2-cycle oil and pre-mixing fuel. These well-balanced, smooth-running machines are powered by Honda engines and meet the toughest emission standards. The impact forces range from 2650 to 3500 pounds. Other features include a sound-absorbing cover, cushioned handgrips, rubber shock mounts, ergonomic throttle, and heavy-duty air and fuel filtration systems. Stone Construction Equipment, 800-888-9926,