L72M21

1st Question, On 1986 C4 Corrvette Coupes what is the difference between option code RPO B4Z Custom Features Package, and RPO Z6A Defogger System? They both seem quite similar.
2nd Question. Was the Corvette radar detector a dealer installed option.
Newbee trying to get educated on C4's. Thanks.

vetteoz

Possible the Z6A is listed separate even though it is part of the B4Z package ?

For example ,the early Z51 "perf handling" package included the Aux radiator fan B4P and the oil cooler KC4 but they are listed separately on the RPO sticker
Likewise on the later cars the 13" brakes were part of the Z51 package but still listed as J55