Why wouldn't the off shore brands give you just as much power as the US built ones? Most of the off shore brands are based off the same design anyway? While I agree that the quality may not be there in some cases, I haven't seen anything yet that would prove to me that they're any lesser performing?
Example....the Chinese made OBX headers seem to be all the rage right now. I've gone through many, many forums of various car manufactures with mostly positive comments regarding their quality, fit and performance, yet they cost a fraction of what the big name brands do. Are they of the highest quality....probably not when it comes right downto the nitty gritty. I'm sure you do get what you pay for in that department to some degree, but I can't for the life of me understand why Coyote headers are double and even triple the price that previous generation OHC and OHV headers are. These North American manufactures can't turn around and hit the customer for the R&D the way they do and not expect to lose out to the other guy. Not everyone can justify spending $1,200 on a set of headers and I think that's why these off shore manufacturers are giving the US brands such a run for their money?