Allroad Exhaust Upgrade

**ben0069** · 26-03-2010,10:22 PM

I went and had a look at a place today called Longlife Exhausts.
They are a large chain with depots all over, website an all.
I would like to have a milltek, but they don't do one for an allroad 2.5, not to my knowledge anyway and they cost!
Talking to the guy who was going to do the work, he said he could remove both the cats, and the resonator and put a single pipe straight through and split it again a bit further back( just after where the resonator sits)with new mufflers and tips.
Basically I dont know jack' about this, so I was looking for some guidance on weather or not this would be ok to do.
Should the cats be left in, will it fail mot if they are removed is the resonator important etc.
cheers all.
ben

**luklawecki** · 28-03-2010,10:43 PM

I just tought u may like this one:

http://www.youtube.com/watch?v=tjYqI39N3B8

or this:

http://www.youtube.com/watch?v=DW0zzTq5gqE

**All-rod** · 29-03-2010,06:08 PM

Yep, as one geezer commented from second clip there:

"Just buy few meters of 76.1mm x 1.6mm pipe and start puting it together.
I think where-ever you from there are some dude who can help you out with welding and other stuff.

Sounds nice though...

**paul b** · 29-03-2010,06:41 PM

Personally I wouldn't remove the cats or whatever. As far as I know, they are needed for the MOT, and despite being able to do all the work myself, I couldn't be bothered.

Apparently diesels aren't tested for emissions, just for smoke, but my argument is that the cats are there for a reason!

You could have the best of both worlds and fit a sports cat which is less restrictive.

However, if it was my car, I wouldn't bother with cats, I'd fit a Jetex stainless steel half system. Like these (you may need to re-enter the car details). I assume the Allroad and A6 Quattro share the same exhaust system?

I've not personally used Jetex products but know of people who have, and they rate them highly.

**All-rod** · 29-03-2010,06:53 PM

Those oval back boxes look really nice, just might be a bit tight round the cutouts in bumper...

**Niall76** · 29-03-2010,09:23 PM

I may be wrong as I'm not a diesel driver but I thought that Diesels don't have cats?

Anyhow, for your information, I priced up an exhaust system from the manifolds back. 2 cats, 1 collector box, 2 silencers. From Audi it was over £1600! I laughed! So did the chap on the parts desk! Anyhow, I asked if he sold many and the answer was no. Cheaper to get a stainless system made up.

**All-rod** · 30-03-2010,07:18 PM

Can only agree, but Jesus! are those just standard oem parts or sports? those prices are ridiculous...

**ben0069** · 30-03-2010,08:18 PM

Thanks for your replies. I did look at the jetex but thought that the tips looked too big, plus the cost is a bit more. I had my mot today and the tester who owns the garage said it would be ok to remove the cats as diesels are not tested for emmissions only smoke and de catting would not make a difference.
Having said that I am still in 2 minds, so I think the route I will take is to fit a sports cat, and the full stainless system, the price for the lot is still cheaper than the jetex system and in my opinion will not look as boy-racer ish.
Will put pics on when the job is done.
I may even try a video to let you hear the sound( if I can manage that)

Thanks again.

**Niall76** · 31-03-2010,05:35 PM

The price I was quoted was for the regular system. I don't think they do a sports version?

Ben - if you don't need the cats then bin them - they'll only be a restriction on the outgoing gasses. By taking them out you not only get better power but also more mpg which I know all you diesel nuts love. lol