In 1991 the B4C `Special Service' police package became available to law enforcement agencies only. Cars were RS coupes with Z28 5.0 TPI or 5.7 TPI drivetrains and Z28 suspensions.
These cars came equipped with the 16 inch wheels and P245/50-ZR16 tires, engine oil cooler, rear disc brakes, and limited slip axle. Midyear, the 1LE 11.86 inch front brakes and HD calipers became optional for the B4C. This package was the only way to get air conditioning and the HD front brakes. There were 592 1991 B4C Camaros built.
For 1992 HD calipers and 11.86 front brakes became standard on the B4C special service package. There were 589 1992 B4C Camaros built.
B4C = RS camaro w/ TPI