Alright.........I wish I could do both but i just think im lucky that i have the option of doing one. im about to get a msp and its only engine mod is injen cai and greddy exhaust. Im trying to decide between getting the thumper kit while running on stock internals or to get the mental addiction forged motor and a haltech e6x with the stock turbo. if i got the thumper i would DEFFINITELY keep it at 6-10psi. i wouldn't risk blowing the motor. But which should i do? Going forged with engine mangement would give me great gains but i really raelly want a fmic, bov (gotsta have the "whooosh") and a downpipe. And the thumper comes with all that and more!!! what do you guys think?