Here is the latest high perf version of this same ZL1 Chevy chassis platform with the LT4 installed, the CT5 Blackwing. They seem to think a beefy STB helps here despite probably other chassis stiffening changes on the CT5. Strut bars make a car stiffer, and on track stiffer is better.
I have the BMR STB, it fits perfectly and serves me well in heavy track duty.
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