Hello i got myself a Dodge Avenger like 4-5 months ago and i wannado something for the volume of the car so basically tuning.

Like i wanna change the

sport exhause
sports air filter
manifold

Those are some things, i heard were changed on cars to get a great volume of the car and i wanted to ask here. If some people here would know what to get specially for the Dodge Avenger!
(i mean that fit the Dodge Avenger with sizes and so on)

kind regards
Markus M.