u/Adventurous_Yam_7955

Hi there, I'm looking at getting a '05 Impreza 2.0 GX (non-turbo) wagon , just wondering what kind of mods (and the approx cost) would be needed to make that iconic Subaru boxer burble sound without it sounding too loud and obnoxious.

Also what would I need to look out for when buying one of these with high KMs with manual?