This is the same as the Magnum 257. The older 257 and the Titan were the same radio, except the 257 delivered more output. There's not much you can do for "mods", unless you want to do the NPC/RC mod, which doesn't do much anyway, especially on this radio. Your best bet if want more power is to turn down the carrier then get yourself a little amp.
RV-4 AMC, AM Modulation
RV-9 ALC, SSB Modulation and Peak Power.
RV-14 FM Carrier Power
RV-16 AM Carrier