2020 Cobalt CS23 Surf This CS23 Surf is powered by a Volvo 300HP V8-300CE FWD DP engine. This Cobalt surf boat also includes Pacific blue hullsides, a white bottom, and a Tahoe gray interior with blue stitching and accents. […] 2020 Cobalt CS23 Surf | 9810 in Chattanooga / New / wake/surf/ski / Cobalt / 20' to 25' 11"