COBB sri - ecu reflash?

My car would hit fuel cut and buck badly at higher speeds durring WOT, when I had just the SRI.

While I was running an SRI (tried HKS and Cobb) and CP-E TBE, I would hit fuel cut (assuming as I never logged anything) in 5th gear at high RPM's (probably around 5000 RPM and 175km/hr). I don't know if my fuel pump is weak or what the problem is. I just pump my stock air box back on until I can afford a better HPF and something to tune with. The car is so much smoother, albiet slower, with the stock airbox on. Power is no longer "instant on".
 

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