We put full Banks power pkg on our 2004 Dolphin W/ same engine. Works great.fr way more power where you need it. The Ram air design is far superior to stock, allows straight thru flow w/ new air box. Most gains are going to come from the headers, big exhaust and reprogram software of the computer. Most noticible power in the 45 to 65 MPH range on hills. Big torque increase. Good luck. Suggest to call Richard at Banks and talk to him about different applications. Good luck.
Alleyman; 2004 Dolphin 5355; Banks Power Pack, Ottominder; 405 Watts Solar, 2010 Explorer XLT Toad. four month boondockers!