OEM LS6 Intake manifold (cathedral port) with cable driven throttle body, fuel rails and coil pack brackets.
Will fit ls1. The LS6 Intake manifold flows 10% better than the ls1 intake.
This is the only one on Phoenix CL.
You may find one on eBay if it's not broken AND you'll be hard pressed to find one with throttle body and fuel rails, and coil pack brackets.