pre cats.
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
Re: pre cats. (devilfish)
I suspect you can... only if the main one is hot enough.
the pre's were put in because they light off faster than the main. closer to the exhaust manifold.
The bigger question - how **** are the inspections in Sweden? Will they dig under the car and ask where the precats are? or don't they really care as long as the numbers are good?
If it is the latter, you should be ok. just make sure you drive it a good distance to warm everything up!!!!
the pre's were put in because they light off faster than the main. closer to the exhaust manifold.
The bigger question - how **** are the inspections in Sweden? Will they dig under the car and ask where the precats are? or don't they really care as long as the numbers are good?
If it is the latter, you should be ok. just make sure you drive it a good distance to warm everything up!!!!
Team Owner
Joined: Sep 2001
Posts: 62,183
Likes: 1,740
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Re: pre cats. (devilfish)
if you eliminate the precats, you might want to think about a hi-flow Carsound or Random Tech cat
Drifting
Joined: Dec 2000
Posts: 1,733
Likes: 0
From: Sarasota FL
Re: pre cats. (devilfish)
Walker/Dynomax has a cat less Y-pipe and cat that is 49 state EPA certified. New converter technology is way beyond that which was available in the 80's. I guess you could find out if your countrys laws are simular to the US Federal or the California rules.
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: pre cats. (devilfish)
Replace the front Y with a mandrel bent 2 1/2" unit to help flow.
Random Tech makes a 3-stage cat to replace the pre-cats and stock cat functions.
While you're at it pull the stock exhaust maniflods and clean em up inside.
Random Tech makes a 3-stage cat to replace the pre-cats and stock cat functions.
While you're at it pull the stock exhaust maniflods and clean em up inside.
