Has anyone got 'experience' with the following 'too good to true' stainless steel downpipes available on EBay?
http://www.ebay.co.uk/itm/AUDI-A6-RS6-V ... 35db8d11b7
At the price they seem a bargain but are they? Quite a few have been bought...
The next option is the Miltek decat downpipes, which as I'm looking to get the cat back sections from Miltek too might be the safer option. Will I still pass an MOT and are there any potential hurdles and hoops to be aware of? I'll be dropping the engine and having both turbos refurbished / upgraded (slightly) by The Turbo Unit then no doubt remapped, biting the bullet and investing rather than selling now for the long term...
Downpipe(s) Advice
Re: Downpipe(s) Advice
Just gut the precats on your OEM downpipes. Same performance. Even if those cheap pipes are welded properly the main cats will be of inferior quality to OEM at that price point. They're both 200cpi but the Audi ones are actually good.
With decat pipes you won't pass the emissions test. And I would apply the same reasoning as above to the catted Milltek pipes (100 cpi would be touch and go for MOT)
With decat pipes you won't pass the emissions test. And I would apply the same reasoning as above to the catted Milltek pipes (100 cpi would be touch and go for MOT)
B7 RS4 saloon Misano red, comfy seats, JHM tune & JHM full exhaust with cats and resonators - gone.
C5 RS6 Avant Daytona/Cognac - gone.
981 Cayman GTS Gray/Orange.
My youtube
C5 RS6 Avant Daytona/Cognac - gone.
981 Cayman GTS Gray/Orange.
My youtube
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Mr Footlong
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Re: Downpipe(s) Advice
Not if you believe the likes of Amanda regarding decat and MOT lol..... Regarding the 100CPI Millteks, I have had them pretty well since I bought the old girl and her emissions have been through the floor at every MOT, they do the job perfectly.JCviggen wrote:With decat pipes you won't pass the emissions test. And I would apply the same reasoning as above to the catted Milltek pipes (100 cpi would be touch and go for MOT)
Current:
23' C8 RS6 Vorsprung - 23' RS E-Tron GT Carbon Vorsprung
Gone:
"Brutus"- C5 RS6 Avant - MRC stage 2 - Milltek non-res + 100 cell cats - Wagner ICs - PSS9 - H&R ARBs - OZ Superturismo LM - C6 Custom brakes - HD RNS-E - Various other bits - 555PS/832Nm
"Taz"- C7 RS6 - MRC stage 2 745PS/1095Nm
12' Cayenne Turbo, B7 RS4, S3, Cupra R, XJR, EVO VII, STI8,5,2&WRX, 106 GTI&XSI, other crap.
23' C8 RS6 Vorsprung - 23' RS E-Tron GT Carbon Vorsprung
Gone:
"Brutus"- C5 RS6 Avant - MRC stage 2 - Milltek non-res + 100 cell cats - Wagner ICs - PSS9 - H&R ARBs - OZ Superturismo LM - C6 Custom brakes - HD RNS-E - Various other bits - 555PS/832Nm
"Taz"- C7 RS6 - MRC stage 2 745PS/1095Nm
12' Cayenne Turbo, B7 RS4, S3, Cupra R, XJR, EVO VII, STI8,5,2&WRX, 106 GTI&XSI, other crap.
Re: Downpipe(s) Advice
Does gutting the cats affect the emissions too just as though there were no cats? Affecting MOT passability (lurvrly made up word), certainly a cheaper option as Miltek down pipes with cats should be called 'Mintek'.JCviggen wrote:Just gut the precats on your OEM downpipes. Same performance. Even if those cheap pipes are welded properly the main cats will be of inferior quality to OEM at that price point. They're both 200cpi but the Audi ones are actually good.
With decat pipes you won't pass the emissions test. And I would apply the same reasoning as above to the catted Milltek pipes (100 cpi would be touch and go for MOT)
Re: Downpipe(s) Advice
No, you would only gut the precats. The nasty restrictive 400cpi cats that are located at the front of the downpipe right after the turbo. They're only really there for cold start emissions.
The main 200cpi cats further downstream would remain intact. There's little to gain by going fully catless other than sound and nasty smells.
The main 200cpi cats further downstream would remain intact. There's little to gain by going fully catless other than sound and nasty smells.
B7 RS4 saloon Misano red, comfy seats, JHM tune & JHM full exhaust with cats and resonators - gone.
C5 RS6 Avant Daytona/Cognac - gone.
981 Cayman GTS Gray/Orange.
My youtube
C5 RS6 Avant Daytona/Cognac - gone.
981 Cayman GTS Gray/Orange.
My youtube
Re: Downpipe(s) Advice
Gutting the existing DP's takes out the pre-cats - leaving the main cats in place.
If you want a bit more then one can take out the main cats and replace with 100cell "sports cars" - as Footers says, as long as the rest of the tune is spot on you will still pass the MOT.
No cats won't pass the emissions tests.
Technically they should fail you on any of the above as they are supposed to check the full cat system is to OEM spec - but they can't (especially removing the pre-cats).
Gutting the DP's (ie pre-cats) is where the big gains are to be had in terms of exhaust flow. Needs a map to take advantage of this though.
Hope that's clearer!
Dave
If you want a bit more then one can take out the main cats and replace with 100cell "sports cars" - as Footers says, as long as the rest of the tune is spot on you will still pass the MOT.
No cats won't pass the emissions tests.
Technically they should fail you on any of the above as they are supposed to check the full cat system is to OEM spec - but they can't (especially removing the pre-cats).
Gutting the DP's (ie pre-cats) is where the big gains are to be had in terms of exhaust flow. Needs a map to take advantage of this though.
Hope that's clearer!
Dave
Re: Downpipe(s) Advice
Cheers, that's the way I'll go...
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