Like the guy said before not ALL ebay intercoolers are bad, CXracing one are decent and im actually running one, They dont rust, but mine does have pressure drop, like, 10psi hotside and 7psi coldside. This is with T04E 60trim compressor though... I think the pressure drop is related to the efficiency of the intercooler as hot air at 10psi bein cooleddown the pressure should drop...