[Woodz428]

Part of the cost, that you didn't mention are probably the install kit parts. They are all the hardware to bolt everything together, belts, hoses,etc. They come all neatly labeled in packaged bags to ease in locating and using them. For me it was worth it on the MKIII, but I preferred to locate all the hardware for the Coupe and went with allen head capscrews to give it the appearance I wanted.