4kq vs 5ktq CAT size differeces

[Todd Phenneger <phen9461@uidaho.edu>]

So,
	I'm sitting there thinking about my 4ktq Turbo Conversion Project.
And I'm thinking, I'd like to put its current Cat on my other 4kq since it
needs a new one.  Then I'm thinking that that means I need one for the
4ktq.  Well, is the 5ktq Cat bigger in Diameter than the 4kq unit.  I
understand that the 5ktq has a 2.5" Exhaust system from the factory and
the 4kq has a 2.25" so it would be normal to assume that the 5ktq Cat is
bigger in Diameter and thus flows better.  RIGHT???
	Anyhow, if anyone knows that would be great because if thats the
case I will use a used 5ktq unit.
	Also, has anyone used the High Flow Brick style Cats that are
advertised in Summit and other Hi Po Catalogues???  How much better are
they.  1/2 way between No Cat and Stock Cat or what. ???
	L8R

	Todd Phenneger
	1985 4000 quattro / silver / daily driver
	1983 ur-q / black / fixing it up
	1984 4000 quattro / modified/ awaiting Turbo Transplant.
	1987 4000 quattro / Saphire Metallic Blue/ Girlfriend's
	1996 A6q / Volcano / Dads Car
   *****1985 5kt / PARTING OUT!