I ordered the iLX-507, speakers and subwoofer from Crutchfield. They include the wiring harnesses for the head unit and speakers as well as speaker adapter plates for the speakers. A master sheet for installation was also included.
With the iLX-507 being the center of the system I next decided on Kicker DS series speakers for the doors.
Kicker 43DSC6704 DS Series 6-3/4" 2-way car speakers for the front doors and
Kicker 43DSC504 DS Series 5-1/4" 2-way car speakers for the rear doors.
For a subwoofer I went with a
JBL BassPro Nano to round out the system. It is a small unit that fits right under the drivers seat.
To help provide a better signal I bought a
Kenwood KAC-M1814 4-Channel Compact Bridgeable Marine/Motorsports 400W Max Power Digital Amplifier from Amazon (it was cheaper). This small amplifier fit nicely where the original Toyota was located.
Installation was pretty straightforward. I soldered up the wiring harnesses for the head unit and the amplifier and then removed the old components. Since the OEM amp is no longer needed it was removed and the Kenwood amp put in it's place. I secured it with HD velcro tabs.
The rear door speakers were an easy replacement using the included adapters. The front door speakers required a little more work as the speaker wiring adapter cables didn't take the Toyota tweeters into account so I has to solder those wires into the main speaker wiring.
For a backup camera I bought this
Natika backup camera. It can be flush mounted and comes with a holesaw. I installed it in the bumper above the hitch-
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1998 SR5 - 5 speed w/ 4.30 E-locker
My 1998 SR5 Build Thread