I'm just a tad confused. You say the intercoolers are $450 but then you list these..
PRJ aluminum intercooler, 2.125 thick, looks cool but they are preorder only, takes months, and expensive. $925 plus manifold.
ZZP Phenolic intercooler, 2.375 thick, is $850 plus $100 for the manifold.
ZZP Aluminum intercooler, 2.25 thick, is $$650 plus $100 for the manifold
WBS Aluminum intercooler(PCV functional with air breather), 2.25 thick, is $550.00 plus $100 for the manifold
Are those just for reference as to what other companies are asking for prices?