Special high-performance package optional from 1990-1995 with special 32-valve overhead cam engine. Also, the LT1 Special Purpose Engine Package offered from 1970 through 1972. Reintroduced in 2009 on the C6 platform with a unique body kit, wheels and a hood with a clear center section that allowed curious parties to experience the all new LS9 engine. For the 2019 model, ZR1 will boast 755 horse power and rocket 0-60 in less than 3 seconds!