I will endorsewhat PNA said 100%.

Three elements wil get you more power;
1) get more and cooler air to theengine
2) get less restriction in the exhaustto get that additional air volume thru the engin
3) Get a performance tune.

In addition, you can change out the injectors to get more fuel to the engine. And you can get a larger throttle body.

A dyno tune will take that 260 HP higher. Arguably into the 275 range or more.

One "performance" mod is a Sprint Booster" There are several available from members here. It doesn't add HP but does improve accelerationby modifying the throttle signal from thepedal tothe Engine control system.

At no cost to you, is a throttle reset. Do a search here for the proceedure.

Some put stickers on their cars assuming it improves performance. Don't laugh, there are stickers that actually help. One says Eurocharged and the other says Needswings.