legacycentral bbs

Kimi: Along with my flange, you may need a new steel gasket and a high
temperature nut of the same thread as your O2 sensor.
The stock Subaru cat is fairly free-flowing, but its ends are small. JC
Whitney also sells 3-hole 3" flanges, which are usually on the same page of
the catalog as the mandrel bends. If you use the stock cat, you only need
one JC Whitney 3" 90 degree mandren bent pipe. If you want a more
free-flowing system with a high-flow aftermarket cat, you need two of the
mandrel bent pipes. I think it is best to mount the aftermarket cat
horizontally and downstream of your downpipe. The JC Whitney pipes are
swaged (enlarged) on one end, so they fit together nicely. One guy that I
sold a flange to cut the heat shield off of his stock cat and welded it back
on to the new downpipe, so it looked like it had the stock Subaru cat, but
was actually just a 3" downpipe. I can't recommend that, because it is not
legal in most areas, but his car sure was fast. Another thing to consider
is header wrap. My turbo (hot side only) is wrapped in fiberglass
insulation and special glass-aluminum foil. My downpipe and cat are wrapped
all the way down. It helps to keep under-hood temperatures down.

Thanks for your inquiry

Bill Robinson
92 Legacy Turbo 5-speed with a few mods
----- Original Message -----
From: <kimitsu@hotmail.com>
To: <vultureboy@mindspring.com>
Sent: Thursday, July 19, 2001 6:35 PM
Subject: the downpipe


> Hi
>
> If i buy a downpipe flange from you, what else would i exactly need
> to build my own downpipe? how many mendrel pipes and how much piping
> will I need? Do i need a flex pipe between the cat and the downpipe?
>
> Cheers,
> Kimi
>


To unsubscribe from this group, please send an email to:
BC-BFLegacyWorks-unsubscribe@egroups.com

This is what i'm considering now, much more because this intercooler
is giving me an ulcer.

Replacing the CAT is legal, as they're only supposed to last 80k
miles or so. As long as you put one back in, i think it's legal to
move it. I could, however, be wrong (and right, at the same time,
depending on the state).

--- In BC-BFLegacyWorks@y..., "William D. Robinson" <vultureboy@m...>
wrote:
> Kimi: Along with my flange, you may need a new steel gasket and a
high
> temperature nut of the same thread as your O2 sensor.
> The stock Subaru cat is fairly free-flowing, but its ends are
small. JC
> Whitney also sells 3-hole 3" flanges, which are usually on the same
page of
> the catalog as the mandrel bends. If you use the stock cat, you
only need
> one JC Whitney 3" 90 degree mandren bent pipe. If you want a more
> free-flowing system with a high-flow aftermarket cat, you need two
of the
> mandrel bent pipes. I think it is best to mount the aftermarket cat
> horizontally and downstream of your downpipe. The JC Whitney pipes
are
> swaged (enlarged) on one end, so they fit together nicely. One guy
that I
> sold a flange to cut the heat shield off of his stock cat and
welded it back
> on to the new downpipe, so it looked like it had the stock Subaru
cat, but
> was actually just a 3" downpipe. I can't recommend that, because
it is not
> legal in most areas, but his car sure was fast. Another thing to
consider
> is header wrap. My turbo (hot side only) is wrapped in fiberglass
> insulation and special glass-aluminum foil. My downpipe and cat
are wrapped
> all the way down. It helps to keep under-hood temperatures down.
>
> Thanks for your inquiry
>
> Bill Robinson
> 92 Legacy Turbo 5-speed with a few mods
> ----- Original Message -----
> From: <kimitsu@h...>
> To: <vultureboy@m...>
> Sent: Thursday, July 19, 2001 6:35 PM
> Subject: the downpipe
>
>
> > Hi
> >
> > If i buy a downpipe flange from you, what else would i exactly
need
> > to build my own downpipe? how many mendrel pipes and how much
piping
> > will I need? Do i need a flex pipe between the cat and the
downpipe?
> >
> > Cheers,
> > Kimi
> >


To unsubscribe from this group, please send an email to:
BC-BFLegacyWorks-unsubscribe@egroups.com