I HAVE A SILVER PR5 AND THE FIRST MOD I WANTED TO DO TO IT WAS AN INTAKE I AM DECIDING ON EITHER THE INJEN CAI OR THE AEM SHORT RAM IF PPL WOULD POST THE UPS AND DOWNS ON THE BOTH OF THEM THAT WOULD BE GREAT FROM WHAT EXPERIENCE YALL HAVE HAD WHICH ONE YOU WOULD RECCOMOND I AM LOOKING FOR SOUND...