magnaflow performance help!
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Borlas sound much better, not even a comparison in my opinion. I have a Borla-made Roush muffler and love it. But if you think stock sounds good and just want a little bit more, a 22" Magnaflow would be good. For Borla, the center/center ProXS is what you want. For just cutting out the old one and slapping a new one in, it should be 2.5" in, 2.5" out. They may have bumped the exhaust diameter up from 2.5" to 3", but I'm not sure. All of the 04-08 5.4s have 2.5".
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#7
Not always tru. Borla multi-core are for racing and they are designed to be quieter. In legal racing there is decibel restrictions. So Borla made the multi-core to before as same as the sportsman but a little quieter.
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#8
This goes tru for my 02. It got a little raspy at high RPMs with a Borla turbo muffler, LTs and not cats.
#9
Most of the "race" mufflers from other companies just mean it's loud from what I remember anyway. Like all the smaller and knock-off companies. But Borla is actually serious, so I can see that. Their multi-cores are freakin expensive and some of them are quite long.
Last edited by KMAC0694; 05-12-2014 at 02:19 PM.
#10
But that info i got about the decibels was straight from a Borla rep.
#12
Not exactly but I bet your system does have some bark!
In that case I will never ever buy a multi-core.
In that case I will never ever buy a multi-core.
#13