Chevrolet had some big plans for the new ZR1 during production, and they were willing to go through some pretty rigorous steps to keep everything under wraps. One of those steps was in an effort to keep the new, much larger, supercharger secret.
Corvette chief engineer Tadge Juecther said Chevy stamped "BAS" on the part instead of Corvette ZR1. The thought was that people in the factory would think it stood for "Belt Alternator System." A significantly duller than a giant supercharger.
Too bad everyone working on the car saw right through that and interpreted the stamp as "big ass supercharger."
The new LT5, a 6.2-liter V8, has a supercharger that is 52 percent larger than its predecessor, the LT4.
H/T: Brad Anderson