They may not be new introductions at this year’s Miami International Boat Show, but for fans of the GM LS engines, IMCO Marine of California and Nevada has come out with a series of PowerFlow LS Manifolds for marine use. Available in either polished or black, the headers are designed for use with the small-block LS engine and are water jacketed. The kits include all necessary gaskets and hardware. Retail pricing starts at $1,377. Contact IMCO Marine at 909-592-6162 (Cal.); 888-427-7436 (Nev.); www.imcomarine.com.