1.8T downpipe+decat?any good?

[sam_20vturbo]

seen this on the old ebay, wondered if anyone on here has any experience of them?

http://cgi.ebay.co.uk/VW-Golf-GTi-Beetle-A3-TT-TURBO-DE-CAT-Decat-Downpipe_W0QQitemZ140080790753QQihZ004QQcategoryZ38786QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

Ive just bought a cat back miltec system and havent got it fitted yet, but im now thinking i should wait and get this, then get it all fitted together?

Cheers
Sam

 

[Prawn]

from what ive picked up about these on this and other forums, if you have an older AGU engine it will work ok, as they only have one lambda i think, the newer DBW engines also have a post cat lambda i think, and will throw up fault codes and some sort of light on the dash.

as to what gains are available, im not sure, but id be interested to know, as i have seen them too, and would like to know if its worth doing!

 

[Booth_S4]

shame really, would fit an S3 as it has 2 pipes into one at the cat!

Not really sure whether or not you would see an increase in performance but you will defo notice a big increase in noise!

 

[sam_20vturbo]

how will i know if i have an older AGU engine? ive got a 1998 1.8t sport...?

 

[portsA318T]

Have a look at the sticker in the engine bay. Thats if it still has it. The engine code should be written on that.

 

[sam_20vturbo]

but then how will i know once ive got that? sorry im pretty clueless about the whole thing lol

and also how do i know if mines a facelift model or not?

Sam

 

[portsA318T]

I was wrong there. My sticker in the engine bay doesn't say what engine code it is. Sorry. However it was in my logbook. What year is your car and model?

 

[M44 DUB]

You'll have a pre-face lift model same as mines

 

[sam_20vturbo]

its a 1998 A3 1.8 T sport. I think its early 1998 as the cd changer ive just had top buy for it is a pre 1998 fitting.

Sam

 

[portsA318T]

I have a 98 T Sport as well and its an AGU engine.

 

[daz2347]

should be a AGU vag changed them mid 2000. pipe works well had one on my old 1.8 gti the only problems is they boom a bit if sitting on the motorway at 60-80 you will soon get peed of with it.

 

[brucelee1973]

shame really, would fit an S3 as it has 2 pipes into one at the cat!

Not really sure whether or not you would see an increase in performance but you will defo notice a big increase in noise!

Got a 210 BHP S3 on a 2000 plate, Do you know if this will fit

 

[Tallpaul]

Got a 210 BHP S3 on a 2000 plate, Do you know if this will fit

No, the one in the link won't fit a K04 turbo or a quattro equiped S3.

Anyway, you'll fail your MOT without a CAT.

Also, as mentioned, wide-band lambda equipped cars will throw a fault code and probably mess up the air:fuel ratio unless mapped for the decat.

 

[Prawn]

sorry to bring up such an old post. but i thought it was far better than starting a new one!

has anyone actually got any experience with a decatted AGU engine? is the standard cat actually restrictive at all?

im having my car remapped in a month, the mods when its remapped will be a miltek catback stainless exhaust, CAI, and a forge DV. would it be worth me decating the car as well? i know its an MOT failure, but would the benefits be worth the hasstle of refitting it once a year for MOT? or is it simply a bad idea and not worth it?

 

[PocketRocket]

Without cat should help a bit at high revs, but better is to put a 2.5" or 3.0" DP with high flow cat, and avoid pollution

What is MOT?