Facelift RS3 Genuine Secondary Cat Bypass Pipes

DW81

Registered User
Just a quick question lads, those of you that fitted the de cat pipes yourself did you use exhaust paste? If so was it applied to the two joining pipes that the Collier sits over or the inside of the Collier itself? I was speaking to someone in work on this and he reckons that the two pipes will be a bitch to pull apart if applied there. Just want some of your opinions please lads, cheers.
 
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T-800

Guest
Just a quick question lads, those of you that fitted the de cat pipes yourself did you use exhaust paste? If so was it applied to the two joining pipes that the Collier sits over or the inside of the Collier itself? I was speaking to someone in work on this and he reckons that the two pipes will be a bitch to pull apart if applied there. Just want some of your opinions please lads, cheers.

When I changed them on both previous RS3’s I did the sleeved ends ‘dry’
I did start it up and check they weren’t leaking though.

The only time I had to use Holts sealer was on the Golf R Res Delete pipes.
 

billymc92

Kyalami Green Vorsprung- Sportback
By the looks of this picture. My car is fitted with secondary cats. 11 and 10

8D3E9316 17D5 4A5F 8B01 4A9DB547D356
 
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T-800

Guest
Well that’s what the dealer sent me and is my VIN number.

The picture isn’t accurate for uk cars

but there’s about 4 different part numbers Billy.
2 refer to 2nd cats
2 refer to straight pipes

Look under your car you’ll see them.

3ec6c2b676d7e4b120c63c960a99c0a1.jpg


3317de912467fb217f03e621eef55d7d.jpg
 

billymc92

Kyalami Green Vorsprung- Sportback
The picture isn’t accurate for uk cars

but there’s about 4 different part numbers Billy.
2 refer to 2nd cats
2 refer to straight pipes

Look under your car you’ll see them.

3ec6c2b676d7e4b120c63c960a99c0a1.jpg


3317de912467fb217f03e621eef55d7d.jpg

I’m offshore at the moment so can’t check. But I’m positive it does have them. I seen the big cats. Just wasn’t sure if it was silencers or the cats. But they definitely were not straight pipes like your images
 

Leo-RS

Registered User
I’m offshore at the moment so can’t check. But I’m positive it does have them. I seen the big cats. Just wasn’t sure if it was silencers or the cats. But they definitely were not straight pipes like your images

Do you have the sports exhaust or standard exhaust?
 
T

T-800

Guest
I'm pretty sure @AudiNutta had a 'standard' exhaust RS3 and confirmed it had no 2nd Cats.
It's back in this thread somewhere......
 

Leo-RS

Registered User
I’m pretty sure he would have specced sports exahust T800
 

DW81

Registered User
Just my thoughts on this. Are the back boxes different on the FL model like they are on the PFL? If so would you need more than just the straight bypass pipes to get more sound?
 

Phil3

Registered User
Possibly be hard to find that out unless they are a different shape... as they’ll have different part numbers with them being different colours... I’d guess
 

AudiNutta

Moderator
Staff member
Moderator
No @Leo-RS...... he had a standard exhaust loan car before his arrived. It’s in this very thread a lot of posts back.

Correct, I can confirm both the Sports Exhaust and Standard Exhaust is equipped without the Secondary Cats. The Bypass pipes are there though, it isn’t a different exhaust with a single centre section.
 

JonoNZ

Registered User
I checked mine today, FL Sportback with Sport/RS exhaust and it does NOT have secondary cats. Car delivered for the NZ market.
 
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DW81

Registered User
Ok, so I spent about an hour this afternoon fitting the Audi secondary decats. Had a touch as only one of the m8 studs sheared off. New ones are on the decat pipes, ordered two new gaskets but the originals still looked good but fitted them anyway. 6 new copper locking nuts abit of copper grease and bobs your uncle Fanny’s your aunt do to speak:tearsofjoy:
Took it for abit of a test drive no more drone than before as I have the exhaust valves unplugged, pops on downshifting are a lot louder and a lot more of them in one hit. Recommend this mod.
 

AudiNutta

Moderator
Staff member
Moderator

Are you only here to sell stuff? Haha!

You just said you have some to sell and now you’re asking somebody else how much they are selling them for?

Do you have an RS3?
 
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