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Old 03-14-2020, 06:29 PM   #13
DarkSunrise
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Join Date: Apr 2012
Drives: 22 BRZ (Previously 13 FR-S)
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Different header configurations I've had since stock, in order:

- Stock + 93 oct
- JDL UEL catless header + 93 oct
- FT86SF catted header + 93 oct
- Stock + 91 oct
- Stock + E85

As with most things in life, it's all relative. You'll notice a difference with each change, but will get used to it. Then you won't notice it again until you go back to stock. For example, I'm running E85 now and have gotten used to it so it just feels normal and I don't notice it. But when I change back to 91, I can immediately tell the difference.

The only configuration where I constantly noticed the difference was the one that eliminated the torque dip, i.e., FT86SF catted header. The elimination of the dip is something you feel everytime you pass through it.
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