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This engine would make a bunch more power with a longer header but that would require relocating the cat and O2 sensors and it would need a mandrel bent 2.25" exhaust to the bumper.
To get it right it would take some dyno time and probalbly a couple of prototype headers which none of the mfgs are willing to devote the time and $$ to for a limited market and I don't blame them. From what I have seen Scion owners want more performance but don't want to pay for it. True, that's a generalization but is there anyone out there willing to pay $600 for a header and another $550 for an exhaust system? It would make significant power but it won't be CARB legal, the lab testing for that cirtification isn't cheap!
Real hot rodders don't pay someone to modify their car for them. If you don't know how to do something... LEARN!!
I have been seeing alot about DC headers. What other header would people recommend for an XB? How much HP do you think it increases by realisticly? 20?
A DC Sports headr will get maybe 5 hp max. 20, from just a header, no, not out of our stock 1.5s. Remember, we share the same engine as the Echo. Its geared higher to make use of the limited horsepwer. I don't think the Scion xB or its overseas cousin, were ever developed to make horsepower, more of an economy grocery getter.
But, I have noticed a difference in the top end using the DC Sports header. Definitely a worthwhile investment along w/ the Injen short ram, and Tanabe axle-back.
You definitely don't hear stories about the xB stomping Honduhs.
i can have something top notch made if anyone has a stock exhaust manifold and IM available. the exhaust manifold is more so for the flange. Company is in Californial and i'm in NJ or i'd be handing them my own