Every vehicle manufacturer spends a lot of time and money getting the compromise right for power and noise levels.
An aftermarket filter manufacturer spends minutes specifying one that physically fits. Similarly, as do the exhaust manufacturers.
There is a lot of physics going on with an engine and gas flow. The engine does not suck consistently, but each cylinder sucks a little and often, like a dog panting. The valve opens and air rushes into the cylinder, then the valve shuts, but the incoming air is still moving, so hits the valve and bounces. Intake sizes and lengths have all been designed to cope with this, to work over the full engine speed range and not interfere with each other. The air filter box is also a plenum chamber, where gas movement can stabilise. You've probably binned this. You may have also displaced any breather or vacuum tubes, so these will not be doing their job properly either.
As the exhaust vale opens, the hot gases expand and rush out. Then the valve shuts. The exhaust is still moving, so creates a small vacuum behind it. This draws the gas back towards the valve a little. A bit like two steps forward and one back. This is why at the rear the exhaust chuffs.
The vehicle manufacturer has again spent a lot of time and money getting the gas flow right. They have to silence it, and allow the gas to escape efficiently. The exhaust length needs to be right to match the gas movement, or it will affect the escape of the gas. Any change to length, or diameter will change this. If you add a larger diameter pipe, the gas moves a shorter distance. If by chance you've chosen one that still works, well done. If not, you get more noise but less power. This is why so many mopeds make a lot of noise but don't seem to go, because they don't.
Unless you source intake and exhaust from expensive performance specialists, you are unlikely to gain anything, apart from annoying the neighbours as you leave and arrive. Any such modification should also be advised to your insurance company, or you may void your insurance. It goes towards them assessing you as a risk.
Put it back to standard, enjoy it for what it is, not what you want it to be. If you want more power or more performance, upgrade the whole car to one with a bigger or more powerful engine.
Or just ignore me and see what others suggest.
