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Discussion Starter #1
Hi guys, well after a few years without an Alfa (previously had a 2lt GTV) im back, and now loving my 1.9 16v JTDm GT. Ive been looking around and searching the forum for some info but now im lost. Is anyone still making a decat pipe for the JTDm? Or does anyone have one for sale?

Also one thing that has confused me is ive seen various info on which years have a DPF and which dont. I have a 2006 (06 plate), does this have one? If i remove it will it need to be coded out?

Any help would be greatly appreciated..... even a link to a thread which has probably already been done to death!1 :thumbup:
Cheers
Chris
 

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A UK GT is highly unlikely to have a DPF.
and yes that has been asked a lot...!
 

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Thanks for the quick reply, at least that pretty much answers the first bit..... now just too try and find a decat pipe.
JTD-Performance sell decat pipes, pretty popular here - Performance parts for JTD engines! - JTD-performance.com

SquadraSportiva have a selection, don't think they stock the pre-cat delete downpipe though - Alfa Tuning & Fanartikel Shop

Wizard Exhausts can make you up pretty much anything you want - https://www.facebook.com/WizardExhausts/

I have a Wizard decat downpipe myself, and I've gotta say that the quality of workmanship is second to none... Pretty much weld-porn if you're in to that sort of thing...

Plenty of people very happy with the JTD-Performance items though, absolutely nothing wrong with them. Also you get them for a good price when the GBP:EUR rate is strong in our favour ;)

You looking at replacing both cats, or just the one?
 

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Discussion Starter #5
JTD-Performance sell decat pipes, pretty popular here - Performance parts for JTD engines! - JTD-performance.com

SquadraSportiva have a selection, don't think they stock the pre-cat delete downpipe though - Alfa Tuning & Fanartikel Shop

Wizard Exhausts can make you up pretty much anything you want - https://www.facebook.com/WizardExhausts/

I have a Wizard decat downpipe myself, and I've gotta say that the quality of workmanship is second to none... Pretty much weld-porn if you're in to that sort of thing...

Plenty of people very happy with the JTD-Performance items though, absolutely nothing wrong with them. Also you get them for a good price when the GBP:EUR rate is strong in our favour ;)

You looking at replacing both cats, or just the one?
Ideally both id guess. I want to try and get some mods in place ready to make the most of a remap. But if there are things that arent worth doing I wont bother. Is it just the two cats on these then?

Going to check those links out now :thumbup:
 

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Ideally both id guess. I want to try and get some mods in place ready to make the most of a remap. But if there are things that arent worth doing I wont bother. Is it just the two cats on these then?
Two Cats.
But no Cats = MOT failure.
 

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Ideally both id guess. I want to try and get some mods in place ready to make the most of a remap. But if there are things that arent worth doing I wont bother. Is it just the two cats on these then?

Going to check those links out now :thumbup:
It'll need a proper map to make the most of having both cats removed... With both restrictions removed you're at risk of overboost as the VNT system can produce much higher boost levels at lower actuation, benefits of a free flow eh :jester:

Deleting just the front downpipe cat is a good start though. Gives an immediate difference to turbo spool up times and throttle response, and with the main cat left in place it's no problem come MOT time :thumbup:
 

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Discussion Starter #8
Cheers for the info guys, very much appreciated. Just having a look at the wizards work.... definite weld porn!! Might also have a friendly MOT tester up my sleeve so will have a chat with them before I consider doing both. Is the over boost easy to rectify? Sorry if all this has been done to death already, me and search are not the best of friends! :censored: lol (however I do try!)
 

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Might also have a friendly MOT tester up my sleeve so will have a chat with them before I consider doing both.
The main Cat under the car is easy to bolt back in (use stainless steel bolts) so you can swap it back in to save the risk of your friendly MOT man loosing his job!
 

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Discussion Starter #10
The main Cat under the car is easy to bolt back in (use stainless steel bolts) so you can swap it back in to save the risk of your friendly MOT man loosing his job!
I was just thinking that!! A few extra ponies is not worth a mates job (worse case and all that!) Just to clarify the first cat replacement is the downpipe 16v for a euro 4?
 

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I was just thinking that!! A few extra ponies is not worth a mates job (worse case and all that!) Just to clarify the first cat replacement is the downpipe 16v for a euro 4?
I think the '06 model is right on the crossover between CF3 and CF4 engines...

Best thing would be to take a peak under your bonnet...

CF4 engines come with a plastic intake manifold, and a lambda sensor in the downpipe after the turbo.

CF3 engines have metal manifold, no lambda in the downpipe.
 

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Discussion Starter #12 (Edited)
I think the '06 model is right on the crossover between CF3 and CF4 engines...

Best thing would be to take a peak under your bonnet...

CF4 engines come with a plastic intake manifold, and a lambda sensor in the downpipe after the turbo.

CF3 engines have metal manifold, no lambda in the downpipe.
Cool, I'll go look shortly, will give me something to do whilst I'm bored at work! :)

Looks metal to me with a lambda going into the cat??
 

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Cool, I'll go look shortly, will give me something to do whilst I'm bored at work! :)

Looks metal to me with a lambda going into the cat??
You sure you're looking at the right part of the inlet manifold?

It's hidden at the back of the engine bay, under the plastic engine cover..

The exhaust mani for both engines is cast metal.
 

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Discussion Starter #14
Definitely looks metal to me. Right at the back hidden away. I would whip the engine cover off if i was at home, but im stuck at work.... and its far warmer inside! lol
 

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Discussion Starter #16
So...... I decided to have a chat with a local exhaust fabricator just to see what prices they would do as I was told they were very competitive. £350 for the downpipe and 2nd decat!! Thought that was a tad steep???
 

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So...... I decided to have a chat with a local exhaust fabricator just to see what prices they would do as I was told they were very competitive. £350 for the downpipe and 2nd decat!! Thought that was a tad steep???
Downpipe and 2nd decat pipe from JTD performance for about £160 plus shipping.
 

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Discussion Starter #18
Yeah I checked that yesterday, will be ordering from them once I've had someone look over the car first (only just brought it). I emailed them earlier to see about shipping costs...... £25 to ship both items! :)
 

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Discussion Starter #19
Yeah I checked that yesterday, will be ordering from them once I've had someone look over the car first (only just brought it). I emailed them earlier to see about shipping costs...... £25 to ship both items! :)
Ok.......so i didnt wait for it to be looked over (might bite me in the a$$) but the down pipe and decat have been ordered. Hopefully shipping wont take to long! :)
 
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