I bought my 2007 Mazda 3 back in February of '07. Since then I have upgraded the audio. Front Doors: Polk Audio DB6500 6.5" Component in the doors and 1.5" Component Tweeters in Door Sails.Power Handling: 75 wattsBack Doors: Polk Audio 5x7 Coaxial Speakers. Power Handling: 65 wattsAll Speakers powered by: Rockford Fosgate Amp. Pushing 300 watts or 75watts per SpeakerSub: Rockford Fosgate 10" P1 Power Handling: 300 Watts Max / 150 RMSAmplifier: Rockford Fosgate P300 Power Handling: 300 Watts Max / 150 RMSExterior: DC 340 Black Mesh 17" Rims and Nitto Neo Gen Shoes (215/45/17).Eibach Pro-Kit 1.8" DropEngine:Weapon R Secret Weapon Short Ram Air Induction, OBX Racing Header, OBX DownPipe Cat Delete, Upgraded 2" pipe to 2.25," Magnaflow Highflow Spun Catalytic Convertor, Flowmaster DBX muffler, Magnaflow Tip.Interior: Lighted door sills "Mazda3" in Red. Lighted foot wells connected to a switch in cup holder as well as lighted cup holder (custom install). Voltage Condenser added to stabilize current and grounding noises. . After the Eibach lowering springs.