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Old 09-26-2017, 04:35 PM   #1
JayJayTheJetPlane
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3"-2.5" DP to 3" catback question

So I have a 3" Beluga Catless Downpipe that tapers to a 2.5 midpipe, found a good deal on an spm track catback but that entire exhaust is 3"...my question is what danger or good (?) will i be doing if i connect the 2.5 midpipe into a 3" catback, or should i just stick to the midpipes diameter and continue with a 2.5" catback?
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Old 09-26-2017, 10:18 PM   #2
FriggenT
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None, it will make no difference in performance at all...just sound.
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Old 09-27-2017, 12:43 PM   #3
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None, it will make no difference in performance at all...just sound.
i x2 this.

If you have a deal on something that mates to it do it.
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just like god intended. he didnt kill off the dinosaurs for their sweet sweet bone juice to have it go getting wasted by eco-obsessed torque thieves.
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Old 09-27-2017, 04:53 PM   #4
zrickety
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Isn't the taper at the back of the downpipe? Local muffler shop should be able to trim it and connect 3" all the way.
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Well i did use a breaker bar to snug up that nut instead of a torque wrench.
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Old 09-28-2017, 12:42 AM   #5
lilonespaz
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Isn't the taper at the back of the downpipe? Local muffler shop should be able to trim it and connect 3" all the way.
not on the beluga downpipe it starts closer to where the cat would be located.

take a notice at the mid pipe (where the cat would be located) and you can see it tapers there.
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just like god intended. he didnt kill off the dinosaurs for their sweet sweet bone juice to have it go getting wasted by eco-obsessed torque thieves.
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