Mercruiser 4.5L MPI 250HP, MTX Folding Arch Tower, Cockpit and Bow Cover , Sea Deck Cockpit Flooring, Sea Deck Platform Flooring, Simrad NSX9, Trailer ENDLESS POSSIBILITIES Everything that has made Chaparral's wildly popular SSi Series the talk of the waterways, gets bigger and better with the amazing 21 SSi. The 21 SSi's style is captivating, but it's appeal is more than skin deep. Stainless steel hardware, composite seat bases, a cockpit drainage system, Extended V-Plane running surface and a molded fiberglass dash are keeping with the Chaparral DNA. Step up to the 21 SSi and enjoy wraparound seat backs in the bow, an anchor locker forward and room for everyone.