Only about 25k on these. From an '06 4.8L

Injectors - $50 shipped OBO
http://www.ls1truck.com/forums/attac...achmentid=2938

Coils - $60 shipped OBO
http://www.ls1truck.com/forums/attac...achmentid=2936

Exhaust manifolds - $60 shipped OBO
http://www.ls1truck.com/forums/attac...achmentid=2935
http://www.ls1truck.com/forums/attac...achmentid=2933