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Performance Difference between 2.5" axle-back and 3" axle-back?

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Old Feb 5, 2004 | 03:27 PM
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blackwagonrx's Avatar
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Performance Difference between 2.5" axle-back and 3" axle-back?

You guys think it's worth paying $50-$60 to change my axle-back form 2.5" to 3". Everything else before the axle-back is 3", so my exhaust is bottle-necked. Thanks guys

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Old Feb 5, 2004 | 06:10 PM
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Car Info: 2004 WRBlue WRX sedan
I think it's worth it. I would rather have a 3" midpipe outlet meet up with a 3" axleback inlet rather than an 2.5" inlet. I don't know if the good ol' butt dyno would be able to tell the difference, but if you have plans for more intensive mods in the future, having that mismatch might be then noticeable.
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