If the SRT10 Viper is Dodge's "halo" vehicle, then the Viper-powered Ram SRT-10 is its meaner, grittier, big brother. The mad scientists at DCX's Performance Vehicle Operations dropped in the venerable Viper V-10, six-speed manual crash box, along with all new body cladding, snow shovel-like front fascia, performance exhaust, functional hoodscoop, and an angular rear spoiler. The interior features high-grade quality leather seats and SRT-specific details. Meant to be the baddest truck available from a showroom, it proved itself the fastest production truck in the world in February 2004 by hitting an astounding 154.587 mph. The Ram is now available as an automatic-equipped Quad Cab, but the six-speed standard cab is still our favorite.