Yeah, my old Merkur went 12.6's and it was stock from the throttle body to the exhaust manifold. Ranger cam, stock valves, no head porting. E46 compressor, stock turbine side, Procharger intercooler, ported exhaust manifold, C4 trans, 3.55 gears and McCreary tires. Oh yeah, and a dry nitrous shot
Depending on how fast you wanna go, theres a good chance that the best parts are already on the car..hehe. If 13s or 12s is all you are lookin for, you dont need a whole lot and chances are just throwing mods at it wont get you too far.