Man of Honour
I would assume that they were swapped because someone somewhere read that you get more power with tubular headers. So you - about 5bhp with full supporting mods and remap. However, I would be wary or reading too much into this "cheap" business. My understand is, no matter whose name is on the delivery note, the headers are almost all made in the same Chinese factory. That seems an odd place for them to break too: they usually fail at the expansion joint. It's possible that something was allowing them to get stressed, such as a faulty exhaust fitting.
If you plan on any mods, and you need new headers anyway, get them ported if you are using OEM ones.
M
If you plan on any mods, and you need new headers anyway, get them ported if you are using OEM ones.
M