My son's '05 Altima 3.5 (Yea, it's a manual) with my '04 Maxima SE (Boo, it's a 5 speed Auto:-(). Max is stock. Altima has: AEM Cold Air Intake, Intake Spacers, Cattman Headers, Borla Catback, Stillen Strut Bar, Nismo Anti Sway Bars F/R, Racingline End Links, Traction Rods & Motor Mount Inserts, Billit Grille, Smoked Tail Lights, Tinted Windows, De-badged. Next Mod??? Reflashing or Dyno-tuning car.