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Do all new mufflers have 1/8" holes on the sides for venting?

Old 04-23-2013, 10:47 PM
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Default Do all new mufflers have 1/8" holes on the sides for venting?

Just replaced my muffler and there are 2 holes
one on each side of the flat part

They are small about 1/8th of an inch and if you put your hand over the exhaust pipe they leak exhaust

Are these holes for when you get caught in a snow storm?

Do all mufflers have them now?

Its a monroe muffler

I have to go for inspection in a week and wondering if its ok
Old 04-23-2013, 11:46 PM
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Default Re: Do all new mufflers have 1/8" holes on the sides for venting?

probably just drain holes so condensation doesn't build up and rust out your muffler
Old 04-24-2013, 05:04 AM
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Default Re: Do all new mufflers have 1/8" holes on the sides for venting?

not that i've seen on OEM or aftermarket stainless catbacks. might be particular to aluminized cheap-o replacements. but yes, i'm sure i'll pass inspection.
Old 04-25-2013, 12:42 AM
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Default Re: Do all new mufflers have 1/8" holes on the sides for venting?

I thought they were vents but .. i did not see them on my oem

Also anyone had the problem where it sounds like there is a lose weld in the muffler?

has a tinny metallic sound kinda when i get on it

The muffler is suppose to be OEM


Sometimes when the car heats up its quieter .. i think its a bad internal weld sounds a little indy car .. which is really sad on a crx dx automatic that is a everyday car not a race car heh

also my torque curve seems to be lagging in the 2000 to 3000 range


Originally Posted by DCRB
probably just drain holes so condensation doesn't build up and rust out your muffler
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