you wont get that much HP off a factory header...just because ti's "JDM" doesnt mean it will gain you any power...remember, it's factory...meaning that it's basically the same thing as we all have under our hood. The reason why the Primera overseas gets a higher horsepower rating is because in Japan, they are able to use 104octane gas instead of the watered down 92octane we get here, hence the 150ps vs 140hp difference....the other difference is just on emission control to further detone the HP rating....heck, anyone wants to buy my factory G20 exhaust manifold?
