$400 for something I can put together for $150?

I've been hearing a tad too many problems with Troyer's kits as well....
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4.2L V6 - M5OD | 16" Dual Efans | 2" Drop Shackles | K&N Series-77 | Port & Polish TB
Bent Frame Mod | Custom Down-Turned Bumper | Accordian-style bed flooring