Dodge Cummins Diesel Forum - View Single Post - Dual stacks performance pro or con
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post #7 of (permalink) Old 09-20-2019, 02:40 AM Thread Starter
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Originally Posted by Dude's Diesel Performance View Post
I agree. The 4 inch kits can handle quite a bit. Depending on what stack kit you have, make sure you have little weep holes on the bottom of the elbows to allow for water drainage. If you don't then you may wake up one wet morning with lots of soot all over the truck on start up.
How big should I make the weep holes and should i put them at the elbow in the "Y" pipe and both elbows under each stack? So 3 separate elbows...

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