Ford Focus Forum, Ford Focus ST Forum - View Single Post - Those with Magnaflow's Exhaust System (Part #15072)
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Old 09-06-2012, 07:36 PM   #38
Sonic_HedgeHog
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Quote:
Originally Posted by Joey D View Post
If you want a 2.5" exhaust then I'd buy a kit that already was made with 2.5" piping. I honestly don't really see much a difference .25" would really make though since our cars really aren't putting down a ton of power to begin with.
It's the ability to flow, for future head room for other mods. Same goes for picking out parts for custom systems, if they won't flow enough CFM's you'll hinder your ability to make power.
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