All told the complete kit included:
3 Piece Intake, Lower, Mid and Upper
Gasket set, (intake, EGR, Throttle Body, IAB)
J4J1 EEC-IV Computer
MAF Extension Harness
IAB adapter plate
65mm Throttle Body
24lb Fuel Injectors
Fuel Rails
Passenger side Valve Cover
New Heater Pipe
Underdrive Crank Pulley
Serpentine Belt
Approximately 4ft of hose cut to different lengths (sizes per manual)
Assorted vacuum fittings
MAF to Throttle Body Hose and clamps
Air box and filter
Fuel Line disconnection tools
Installation Manual
Cowl Hood
Most of the actual kits to come from Roush came from their parts division, not on the Stage 3 cars. The majority of those kits were incomplete though. The problem was the $3000 price tag. Once Roush stopped making them and just started offloading the kits for cheap, they really started selling. But the problem was that some pieces went quick and they never made new ones. The hood is a prime example. Once the initial few hoods sold, they never made any more and just sold the kits incomplete.
Most kits sold just as mine did; complete minus the hood and crank pulley. I instead bought a 95 R hood (already had pullies) as it would clear the intake. I had plans to open up the rear of the cowl so the filter will get plenty of fresh, cool air off the high pressure area off the windshield, but I've been toying with the idea of molding in a shaker scoop as you really can't ask for better air filter placement. But I'll probably just cut out the cowl for aero considerations (I'm wanting to do a Bonneville run with this car once the motor is done).