Scorpian/miltek exhaust and remap question

When got a bit of money in my pocket i will be soucing a exhaust, i have a itg filter and are looking at either a scorpian or miltek exhaust, then i will get a remap so was woundring what power figures should i be looking at??

James
 
every car is different mate and puts out different figures but i would say 195 + hp at the flywheel