i found that there isn't a lot of coverage regarding air suspension setups for the LS400, though the install is pretty straightforward. the following will briefly describe my adventure installing a system in my 97 UCF20. my parts list: - BC Racing BR-type coilovers - Universal Air Suspension Aero Sport bags w/brackets - 1/4" airline - SMC 3/8" valves - dual Firestone compressors - 5gal chrome tank - Norgren water traps - Viair 165/200psi tank pressure switch - Air Ride Technologies digital gauge (made by Dakota Digital) - Dakota Digital pressure senders - EAI switchbox since i am running dual compressors, i utilized a 4 gauge power wire which needs to run from the battery to the trunk. i found a main harness that enters the cabin located behind the front fender. this was the perfect spot to get the wire through the firewall. i ran it under the door sills. the rear seats need to be removed to go through yet another firewall to the trunk. i opted to drill a hole in a plastic cover neat the seatbelt. i preran my wires for my digital gauge and switchbox which reside under the center console and under the passenger side seat respectively. i ran their wires on the passenger side of the car, again under the door sills and through the rear firewall. speaking of digital gauge, i opted to place it in the ashtray which fit perfectly. i don't have any details on this part so i apologize. i had to make sure the wires don't bind when the door is pivoted. the center console is very tight so the wires were ran with caution, so much as to not hinder the cupholder hide movement.