The VW exhaust design also shakes the dickens out of the cat, so it has to have a strong ceramic core to last. 

Stuart 

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Dennis Haynes
Sent: Monday, March 30, 2015 7:03 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Cold Air Intake

Magnaflow also sells the smaller non CARB approved catalyst for the Vanagon. The GW muffler is also from Magnaflow. Over advanced ignition timing, excessive oil carry over, or coolant in the combustion process are often causes of Cat failure in addition to mixture, ignition, or valve problem. 

Dennis

-----Original Message-----
From: Jeff [mailto:vw.doka@gmail.com] 
Sent: Monday, March 30, 2015 12:54 PM
To: 'Dennis Haynes'; vanagon@GERRY.VANAGON.COM
Subject: RE: Cold Air Intake

The GW CARB approved cat is actually a Magnaflow cat.  

FWIW... I have seen a 50% failure rate on those cats over the last few years.  They seem to fall apart inside.  The good news is that they have a 5 years warranty.

Cheers, 

Jeff

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Dennis Haynes
Sent: Sunday, March 29, 2015 6:53 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Cold Air Intake

The one easy change I have found is the Go Westy Muffler along with their CARB approved Cat. This Cat is large (and expensive). Their muffler is a baffled straight through and it is well made. The price is fair and it is what I now install for replacements. 

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Mark Milby
Sent: Friday, March 27, 2015 3:53 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Cold Air Intake

With what seems to be the easiest horsepower gain, I continuously wonder and search for a good cold air/direct air intake.
Has anyone pieced together a K&N Filter system.

Just wondering.

--
Mm