Eight months after the CERV IV was made, the CERV IV b was made.

It was also a test mule vehicle for the upcoming 1997 Corvette It includes 5.7L LT-1 V8 engine, 6-speed manual transmission axle, 4-wheel disc brakes, front 255/45ZR17 and rear 285/40ZR17 tires on BBS basket wheels, side curtains, no side window glass, and a modified production interior.

The vehicle was sold in 2009 Barrett-Jackson Palm Beach auction for $34,000 (before buyer premium). This car is currently on display in Effingham, IL at the MY Garage Museum owned by Michael and Blake Yager.