hey and welcome to the site.
really no mods are nice on insurance
start with easy breathing :
panel filter = most insurance companies wont bother with them but gains are likely to be less than 3bhp - stay away from induction kits as you will generally lose power
smooth airbox - less disturbance to the airflow doesnt really add power but can increase throttle response.
exhaust manifold
sports cat
and cat back
but youll be lucky to see 10 bhp from that