2007Mazda3i

I bought a 07 Mazda 3i with three mods already put on it (K&N filter in the breather, 60 mm throttle body in the place of the stock 55mm, and a 2.5-inch cat back exhaust with strait through muffler). It feels a good bit faster than the other stock Mazda 3i (06-08) I looked at. I was wondering if anyone could give an idea of how much these parts are worth in the car (torque and horsepower) before I add more performance parts to the car