I think that the one that came with the NEB state patrol car was mounted inside the light bar (in the chrome between the lights) thats all i can say for my car I guess that that probley dosent give ya much help

but that is a real B4C I think that this is the way alot of them came (the lightbars having the sirens built in)
later
jacob
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Ya sure it is just an RS
B4Cyaa
1991 RS B4C
Former Nebraska Highway Patrol Car
305 TPI
WC T-5
Four Wheel Disk Brakes
Only Options
Rear Defrost
Am-Fm Radio
Red-int White-exe
One BA Of A 350 In The Works
Mods
Dynomax Cat Back (to hold me over till I got the $$$ for the Borla)
best 1/4mile Run of 14.92@94.83
with 145,000 on her
http://www.thirdgen.org/rides/index.tgo?action=view&rideid=2201
god speed dale