I am getting 2001 RR 4.6 HSE (heard that model year and HSE model were the best and have fewest mechanical problems). I really want to get an ECU upgrade chip or EFI upgrade but am having trouble finding anything really concrete. Also looking for possible supercharger or custom exhuast or any upgrade that will give me hp, better fuel economy and power. Does anyone have any suggestions or can anyone point me in the right direction? THANK YOU!