Most of the products and info I've learned about are from here Mazda 3 ForumsA list of mods and other anonymous purchases along with some pics.MazdaSpeed Cold Air Intake - Exhaust - SpringsAudio/Electronics Audio Link iPod Adapter Infinity Kappa’s (5 ¼ components front…6X8 rear) Arc Kar 400.4 Arc Audio Flat Line Arc Kar 900.1 Shark Fin antenna Mazda OEM remote engine start/security systemExterior PIAA Fogs w/ Blue RockBlocker Covers Low-tone highway blaster - still sucks Removed 2.3 badgeInterior Blue Trim Pieces (doors & dash) All weather floor mats Mazda 3 Sunshade Pedals 18% Llumar Platinum Plus tintWheelsRays Forged MazdaSpeed Wheels with 225/40ZR-18 225/40R-18 Bridgestone Potenza RE960AS Pole Position's ex -Vredestein Sessanta ex- Goodyear Eagle F1-GSD3's Dunlop Winter Sport M3’s (on stock wheels)Brakes Rotora drilled and slotted rotors w/ Rotora H2 Ceramic Brake Pads . . .