That's a good idea I might get the cat flanged so I can swap the test pipe and cat back in forth if nessasary

 

My cat was flanged already, yours isn't?

 

It is... He just doesn't realize it yet...

 

Awh **** I guess I havnt realized it yet haha

What size is a stock cat in and out let? Really want a 3" exhaust all the way back

Or if anyone has a site to refer me to don't want to pay out the *** for a test pipe though found this one and thinking it should do fine

Your opinion?
ATP Audi A4/Passat (B5) 3" Cat delete Racing Downpipe

 

I'm running that right now. Fitment is pretty good, but I had to use aftermarket hardware cause I got it used. You should also pick up one of these little guys:

O2 Sensor Spacer, For Bosch Style Sensors - 034 MOTORSPORT

 

But it should be pointed out: the ATP pipe is NOT a downpipe, it's a test pipe; merely a replacement for the catalytic converter. The downpipe connects to that test pipe, however.

 

Isn't a test pipe and down pipe the same thing? Help me if I'm lost please :/ also cca4 is that a direct replacement for the cat than or?

Thanks

 

On the 1.8T they are 2 separate entities, that bolt together with a gasket in-between.

On the 1.8T a test pipe is generally regarded as a direct replacement for the cat (for "off-road use only" of course LOL).

 

Awh asked before looked sweet I'll have to get that instead of the spark plug gapper

 

Awh ok makes sense
Thanks lol :P