Quote:
Originally Posted by lsmkr01
A decatted OEM x-pipe with its non mandrel bends (which cause big kinks in the pipe) as well as economy merge section is not the same as a well design piece. Not going to even mention better material and less weight as BMW tries to be as cost effective as possible. Any engineering fluids flow class will teach there is a difference.
How big of a difference remains to be seen and that's what i'm going to do the comparison for. A deeper attention to detail is the whole point of modding right? Correcting the compromises the OEM had to make on the production car. If your looking for bang for the buck then, yes there are better options than an x-pipe but if you want more then the extra money is worth it. Individual mods for different individuals 
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Ya the weight savings is nice, the stock exhaust is pretty heavy. Even stainless steel aftermarkets save somewhere in the neighbourhood of 10-20kg lighter depending on what you get. A full titanium is even more
The akro system is like 50% lighter for something like 40kg reduction if memory serves