All Things Mk5 > Performance Modifications

Decat GT TDI?

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Trekmeister:
Exhaust question: How many cats does a GT TDI 140 have, is it two, one on downpipe and the cat back? If so would having adecat downpipe make any difference when remapped to stage one and would this increase chance of failure at MOT (Emissions etc?)

Thanks in advance

Paul

vRSAlex:
Just the one cat on the pd140.  Straight after the turbo.  I've found that they smooth out the boost and allow the car to rev better.

No issues at mot as they don't test emissions on dervs, just soot test.

Trekmeister:

--- Quote from: vRSAlex on February 12, 2012, 07:00:36 pm ---Just the one cat on the pd140.  Straight after the turbo.  I've found that they smooth out the boost and allow the car to rev better.

No issues at mot as they don't test emissions on dervs, just soot test.

--- End quote ---
I was under the impression the GT has a cat back

Sent from my GT-I9100 using Tapatalk

vRSAlex:
They call the exhaust section that goes from the cat section the 'cat back'.  So if the cat is in the downpipe then the rest of the system is called the cat back.

Trekmeister:

--- Quote from: vRSAlex on February 12, 2012, 07:10:47 pm ---They call the exhaust section that goes from the cat section the 'cat back'.  So if the cat is in the downpipe then the rest of the system is called the cat back.

--- End quote ---
That makes sense now, would removing the cat be recommended, would it give any performance enhancement and would it increase soot coming out the rear?

Sent from my GT-I9100 using Tapatalk

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