B6 Exhaust Piping?

[Bert]

You're going to want to learn to weld or befriend someone that does. Often there are pipe and muffler product catalogues that have details and measurements from which you can determine (adapt) your needs. Custom shops will make up pipes for you but they'd appreciate being supplied with the downpipe (or header), cat and muffler you plan on using. In Ontario it is illegal to circumvent (ie use a 'delete' pipe) the cat, and a muffler shop can be fined and lose it's license to operate for doing so.
Now what you do in your own backyard is a little more difficult for government to control, but if passing emissions standards is something you'd better hang on to one.

[Safety Guy]

I've gone 2" piping and all diameters of cat and muffler on my three cars: two B6s and one B3. Works okay, but obviously I can't provide any numbers or even a pants-seat comparison.

I think 1 and 7/8 would be fine.

Karl

[drddan]

Find out what diameter pipe the OEM auto B6s were using and then go from there. You don't want this thing too wide open and you'll want to try to adapt readily available pipes, cat and mufflers that are in keeping with space that's available under the car.

Good thinking!

at least get aluminized steel, in bigger diameters like 1 7/8 or even 2" you
can get heavier gauges that will last longer.

I had 1 7/8 in mind.

Where do I find 1 7/8 pipe bent for a Festy without paying out the nose?

Stock Festiva is like 1 3/8 or 1 1/2 or something.

I was also thinking of a straight thru NON-catalytic converter. :p

http://www.siliconeintakes.com/index...967672a0e9ba66

[Movin]

at least get aluminized steel, in bigger diameters like 1 7/8 or even 2" you
can get heavier gauges that will last longer.

[Bert]

First clue I got about exhaust performance was when exhaust manifold downpipes for manual transmissions were discontinued and all you could get was the one for autos. And the auto versions were way bigger diameter so that business was an instant no-brainer.

Find out what diameter pipe the OEM auto B6s were using and then go from there. You don't want this thing too wide open and you'll want to try to adapt readily available pipes, cat and mufflers that are in keeping with space that's available under the car.

[drddan]

I am swapping to a B6, and I was wondering about exhaust tube diameter.
I need new exhaust/muffler anyway, so my question is:

What is a good size diameter tube to use with a N/A SOHC B6?

The stock Festiva size is awfully small. :p