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So there are a lot of varied response here to address. First off if you buy exhaust purely for HP increase and are not planning to do anything else you will be disappointed. The purpose for ANY exhaust system is to create more flow, less back pressure, and increase efficiency of other mods. Its not a 1:1 comparison depending on your modifications etc. The HPF exhaust is NOT for those just looking for a different sound, it was specifically developed for those with other modifications and for the signel turbo kit. The short comings are the DP's and if you want "big" gains from an exhaust you need to remove your cats. 0-60 times are not very important to folks so you dont see a lot of that out there with exception of the manufacturer of your car. So if you want all show no go, then save your $$ and get an axle back. If you are looking to supplement your other mods then the HPF is a no brainer. it is $$, but its not for everyone.
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