the EPS started in the 2012 ZL1 and it did "so well" (GMs words not mine lol) that starting in the year 2013 they made all SS and ZL1 models have the EPS as well. the v6's still have standard steering for now.
2013 2SS A6- Vette Doctor tuned-375whp 392wtq
cold air inductions intake
stainless power 1 7/8" headers
stainless works HF cats
stainless works 3" retro chambered exhaust
full de-badge of entire car