Is a Catted or Catless downpipe better?
Catted downpipe provides horsepower gain but not as much as catless downpipe. Catless downpipe provides even more horsepower gain than catted downpipe. You can expect catless downpipe to provide 50 horsepower with tuning (25 hp without). Performance is the biggest advantage for going catless.
Is a Catted downpipe louder than a Catless?
Catless downpipes are always louder because they provide more space and lesser exhaust pressure for sound waves to travel.
Will a Catted downpipe void warranty?
Well-Known Member. It should not void any part of your warranty, but a dealership may void it anyway. As Mark said above, it is probably not worth the fight once it has been denied, even if you are in the right.
Will a Catted downpipe pass smog in California?
Unless you know smog shop that’s not competent (or doesn’t car) you won’t pass. legally, you are not allowed to have an aftermarket cat untill the warranty expires on the OEM on…and on Subaru’s I think that’s 120k miles/6 years.
Can a catless downpipe be used in a car?
Not a big problem, in my opinion. Catless downpipe causes a significant fume smell from the exhaust. You can definitely smell it when your car is idling and you exit the car. You can even smell it from inside the car when you are idling at traffic for some time.
Can a cat downpipe pass the emissions test?
A typical stock downpipe equips 2 CATs – 1 to breakdown CO, CO2 and HC (HydroCarbon), while the other breaks down NOx (Nitrogen Oxide). If your catted downpipe has 2 CATs then you can pass the emissions test. If your catted downpipe only has 1 CAT (most common), then you will only pass the emissions test for CO, CO2 and HC but fail for NOx.
Can a catted downpipe pass a visual inspection?
With catted downpipe you can also pass the visual inspection or pop up inspection that uses OBD2. Catless downpipe is not daily drivable. They are more suited to be used on off-roading or tracking where every little performance counts and emission doesn’t really matter.
Can a catless downpipe cause a fume smell?
Catless downpipe causes a significant fume smell from the exhaust. You can definitely smell it when your car is idling and you exit the car. You can even smell it from inside the car when you are idling at traffic for some time.