'01 Cobra stalls/misses at higher RPM

Well, if you suspect cylinder problems/missing, run an engine compression test and if need be, a leakdown test...and while you are at it, you can check/replace the sparkplugs as well.

Ensure your coilpacks are properly seated on the top of each sparkplug as well [Coil On Plug (COP)]. Look for vacuum leaks too. The above areas cover the majority of engine misfiring related problems.

What else can you tell us about the car's prior history? Was it supercharged/ran on nitrous? Garage queen? Track car? Any recent repair work (especially ignition related) by the previous owner? etc, etc.

G'luck!