Catless Downpipe options

[tmaclax013]

So I'm seeing all this talk about the EPL Stage 2 stuff that has just come out. I'd love to get my horsepower numbers up but I'm concerned with the factory cats. Coming from B5s I've seen people with catted exhausts have some issues with Heat soak and high EGTs. Now I know a lot of people are going to run the EPL Stage 2 stuff with the factory cats but I'd prefer not to so I was wondering what my options were?

[christianb5s4]

What I'd do on these cars (this used to be a popular B5 S4 mod) is buy a second used set of downpipes and punch out the factory cats so it's like a 'piggie pipe'. Based on the design of the factory downpipes, it looks like a pretty straightforward process should you go that route.

[tmaclax013]

I was thinking about that but noticed that usp sells miltek downpipes for B8 s4 that bolt to the exhaust manifold (unlike most other companies whose "downpipes" are just after the cats). They seem to be the proper shape for the c6 but I dont want to shell out $600 and then worry about return shipping and restocking fee if they dont fit

[dluxxx]

I was thinking about that but noticed that usp sells miltek downpipes for B8 s4 that bolt to the exhaust manifold (unlike most other companies whose "downpipes" are just after the cats). They seem to be the proper shape for the c6 but I dont want to shell out $600 and then worry about return shipping and restocking fee if they dont fit

I've looked into this and contacted many companies and the design for the B8 S4 is totally different from the C6. The C6 design from the exhaust manifold back is C6 specific. I was thinking of just doing what christian said and just buy a second set and gut those.

[tmaclax013]

any idea how the car will react to gutted cats? I was curious about this considering it seems like theres only one set of O2 sensors instead of having front and rears

[NickLim]

How tough is this job? I would like to roll around cat less when 24/7 when I am on the track and then when I go on the street to do emissions I will just put the cats back on.... I also don't want to blow my cats the way I drive

[tmaclax013]

How tough is this job? I would like to roll around cat less when 24/7 when I am on the track and then when I go on the street to do emissions I will just put the cats back on.... I also don't want to blow my cats the way I drive

My sentiments exactly, I'm more worried about the health of the motor (exhaust flow) rather than sound or anything else

[MSq5]

If the cats are up high, right there at the headers, as on the S4 and my Q5, it may be a major challenge to get access to them. Not familiar with your setup, though.

[tmaclax013]

If the cats are up high, right there at the headers, as on the S4 and my Q5, it may be a major challenge to get access to them. Not familiar with your setup, though.

They up relatively high, on the vertical section of the downpipes, but not as high as B8 stuff from what I've seen

[kneel]

You could purchase the supersprint one for boat load of $$$$

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[tmaclax013]

You could purchase the supersprint one for boat load of $$$$

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Neil, I didnt see downpipe option on super sprints website. Not that I would buy them anyways because they are pretty spendy, but i wanted to take a look at what their setup is like with o2 bungs and flexpipes.