i bought this set-up from jcwhitney.com that had 6 speakers going accross the roof of the cab. i wasn't too concerned with the head room because i have an extra cab, and anyody i have sit in the back seat i dont care if they need more room anyway. the sound is a lot better since the speakers arent hidden from the seats, and the cost was only $50 on sale. this is perfect if you are trying to get more sound without a bill-beating (spending too much). here is the part number if you want to check it out online: 38ZX0018Y.

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HOSRACN

Black Hammer

Truck Style

1999 F-150 4X4 Supercab
XLT 139" WB Styleside
5.4L EFI V8 Engine
4-SPD Auto Transmission
Black Claercoat Exterior
Medium Graphite Interior

Options

Premium Electronic AM/FM W/CD
LT265/70-R17 OWL All-Terrain
Floor Mats-Carpeted
Electronic Shift--4X4
Trailer Towing Group, Class III
Cloth Captains Chairs
6-Way Power Seat
Remote Keyless Entry
4X4 Offroad Equipment Group[*]Skid Plates[*]Steel Chromed Wheels
Air Conditioning
4-Wheel ABS

Performance Modifications

Pacesetter Ceramic Coated Shorty Style Headers
Airaid Aircharger With K&N Air Filter
Poweraid Throttle Body Spacer
Glasspack Muffler With Split Dual Rear Exiting 18" Chrome Cannons

Other Modifications

GTS Headlight/Taillight Blackouts
Tinted Windows
Billet Grille
Ford Hitch Cover & Lock
Ventvisor Window Air Deflectors
Wheel Locks
Spare Tire Lock
Hitch Endcaps
Aiwa CD Deck CDC-X176M
6 Additional Speakers Mounted On Roof In Rear

 

I like that concept do have any pics of it installed in your truck and do you have an amp hooker up to it? oh and how did you get it for $50 it says $85 now. thanks