Welcome, you didnt loose anything. Even with an after market intake you only gain 1-3 hp. For real hp increases look at a turbo back exhaust and engine management. Read up on boost spike/creep, you'll have those issues with your car if you put a downpipe on it. You may also upgrade to a better panel filter, should also increase the pssh noise level if thats what you were looking for. OR you can get a cobb sf intake or SPT. Both pricey but they just make noise.