The ZR2 is one of the special purpose package that Chevrolet offered in 1971 alongside the ZR1. This special purpose package was identical to the ZR1, except that instead of a small block LT1 engine, the ZR2 came equipped with a 454 cubic inch LS6 engine. Like the ZR1, the ZR2 package also included the same ordering restrictions – namely none of the “creature comfort” amenities that were appealing to many consumers were available with that package.
It may be for that very reason – or perhaps that combined with the substantial cost increase that each option carried with it ($1,010 for RPO ZR1 and $1,747 for RPO ZR2) – that so few of either performance packages was ordered during the 1971 model year. In total, only eight Corvettes were ordered with the ZR1 option, and only twelve were ordered with the ZR2.