In article
<6f7f3767-b2df-45e3-9da1-c751206fbd69 (AT) e6g2000prf (DOT) googlegroups.com

Why not have them get the direct fit cat?

It's your truck, you can cut and cobble all you want.
Question; when it's time to replace the exhaust pipe behind the
cat, are you really happy with cutting the flange off of a brand
new pipe in order to make it fit your previously installed one
size fits all cat?

If all it takes is even less work to verify whether the cat is
restricted, why wouldn't you do that instead of just throwing
parts at it?

Cars and trucks rarely if ever respond the way a pissed off wife
or girlfriend do, i.e., they seldom improve their behavior the
more money and gifts you lavish on them.

It is against federal law to remove a functioning catalytic
convertor from any vehicle originally equipped with one no matter
what the reason. What valid reason do you have if you're not
even willing to test the thing to see if it's restricted?

I never said wasn't going to have it tested. All I have been
interested in is how feasible the project would be to do by myself. I
wanted to know my options so when I take it to the shop and if they
say it is clogged I can make an educated decision on whether or not to
have them replace it for me.

As to not getting the direct fit cat, If the direct fit involves more
work ie, removing the manifold, fighting with rusty bolts, welding,
and the universal just involved cutting and clamping and they both
work the same, I don't see the need for the extra work other than to
keep it looking cleaner under the truck. When the muffler needs
replacing, later down the road (the one on it is only a year old) I
don't mind cutting a flange to fit into a coupling as long as it
works, Or just remove the clamp from the rear of the cat and attach
the new pipe.

Look, I'm not trying to start and argument or compare who knows more
and is a better expert. All I wanted to know was how difficult a job
replacing the cat myself would be. It is an almost 20 year old work
truck that I plan on driving into the ground. Honestly if I can patch
in a cat while it may be ugly, if it fixes the problem, is safe and
legal, then I don't really care how it looks. I am no expert but
fitting pipes doesn't seem to be rocket science, it is in a straight
section of the exhaust and if it is simply cut out, attach a coupling
to the pipes, and clamp on the the new cat I don't see the prob.
However say, that the clamps don't really hold or there was another
reason as to why that would not work. A simple, No, I wouldn't
recommend it because there is a lot more involved than it appears, is
all that was necessary.

In article
<3ec00a2d-9d91-4ff0-b956-be176fcc8f5d (AT) k39g2000hsf (DOT) googlegroups.co
m>,
drallan (AT) smcm (DOT) edu wrote:

You never said you were either.
You make opening claims of performing diagnosis yet all you've
done so far is shotgun unneeded parts at this thing.

Feasible is as far away as sliding under the truck and looking,
where you'll find a 2 1/2" pipe which is the cat inlet slipped
over the outlet of the Y pipe. At the back of the cat, you'll see
a 2 7/8" ball coupling held together with a few bolts.

You don't have any options if the cat is plugged. If it's
plugged, you need a new one.

Again, slide your ass under the truck, it will be obvious once
you look at the exhaust lay out.
Universal cats are never easier to install.
Never.

I never mentioned the muffler, I could care less about your
muffler. The part you're so intent on butchering is the exhaust
pipe ahead of the muffler, once butchered, any subsequent exhaust
work becomes an absolute miserable chore. You want to cut the
front flange off of the exhaust pipe to use the universal cat,
the exhaust pipe is now shorter meaning you'll need a cobble job
patch to make it long enough, you've now also substituted bolt
together flange fittings for slip together joints, slip together
joints never ever come apart easily once they're clamped.
Again, go under the truck and look at what you will be working on.

I could care less if you want to argue or not.
Like I said, it's your truck, fuck it up as you see fit.

Well, you wanted to know more than just that.
Tell me; how are total strangers supposed to know what your
capabilities are and what you might find difficult?

Or having it kill you.

So why haven't you bothered to look at the installation to see
that what you're intent on doing is making much more work for
yourself and leaving bigger possibilities for exhaust leaks, the
system coming loose and becoming a total bitch to salvage when
other parts need replacing?

It's not rocket science, but steel pipe doesn't stretch like a
pair of underwear, so you'd better have a plan when the square
peg doesn't fit in the round hole or you find yourself with a
1/4" gap between the two round holes.

A direct fit cat will be extremely easy to install (would be to
me) as long as you have a way to slice the inlet pipe of the old
cat open.
The rest is just a few nuts and bolts.
There is a reason GM designed it the way they did and it would be
foolish to not take advantage of the way they designed it.

On Jan 14, 3:34�pm, dral... (AT) smcm (DOT) edu wrote:
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~:~
MarshMonster
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poker.......takes a toke.........wonders if the pot is better in
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