Progressive Suspension's street-rod-styled 430 series of shocks (Booths 702 and 3359) use a high-pressure-gas/mono-tube design with deflective disk damping. The shocks can be mounted rod up or rod down, depending on the application. Threaded pre-load adjusters allow for tool-less adjustment, as well as easy tuning of ride quality. Aluminum spring perches are complemented by smooth lines and a polished-chrome body. The body is also available in a contrast-cut, black-anodized finish.