Mercury Forum - Mercury Enthusiasts Forums - 96 Merc GM GS Help with Power

Hi everyone I'm trying to find out what i can do to get more power out of my boats(merc) motor(4.6L) any place i go there is nothing that i find that will help me to add power to the motor. I also am not sure if i can get 96 4.6L mustang after market Parts im new in the ford area i just want a extra 100 150 hps or make my single Exhaust to a duel exhaust system something i also need find out what kind of merc i have i dont want to pay ford $300 to tell me if i have a performance package or handling package or no package added if someone canm help me with that also id really appreciate it.. Thank you