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