That one has billet controls and defrost directional vents. I found the packing list, mine is the 506101 Gen II Heater Kit with Defrost. Comes with:
Gen II Heater with Defrost Sub Case
Gen II Heater with Defrost Wiring Kit (includes the plastic controls.)
Universal Defrost Duct Kit (I did not use this)
Gen II Heater with Deftost Installation Kit (nuts, bolts, grommets, hose clamps, elbows, variable valve, wire ties, etc.)
2" Duct Hose, 5 feet.
Hope this helps! $237 is way better than $431.
Cheers!