easy ways to add little more power? 1998 neon

i have a 1998 dodge neon 5 speed all stock only thing i added on was a tac because it did not have one i was wanting to add a little more power whats the easyest way to do this im hopeing for a 25hp gain but anything would be good its a sohc would it be worth the troble to find a dohc neon motor and do a switch ?

The cam from a 95 is good for 4 HP and is a direct swap in. You can upgrade to a DOHC muffler....it flows better than the SOHC muffler. Try swapping on a throttle body from a neon that has an auto tranny. This will help you rev quicker and its slightly larger (52mm as opposed to 49mm). Build your own CAI using the 3.0L intake trick. Also, get a UDP.

This should help you get started.