Replacing Cat Pipe on Newage - ScoobyNet.com - Subaru Enthusiast Forum



Replacing Cat Pipe on Newage

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Old 13 January 2018, 12:24 AM   #1  
JoeB
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Default Replacing Cat Pipe on Newage

So, the cat pipe on my blob has rusted and completely sheared off at one end. I would like to replace it with one of these decat pipes

http://scoobyworld.co.uk/catalog/pro...roducts_id=179

Couple of quick questions, firstly am I correct that by installing a decat pipe here, it will still leave me with 2 cats (uppipe and downpipe) so the car will still be be MOT compliant on emissions ? (04 WRX, engine wise car is standard)
Second, would the increase in exhaust noise be significant ? I currently have an non-resonated centre section and Ninja back box?

Cheers for any help
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Old 13 January 2018, 10:25 AM   #2  
stamina_daddy
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Default Wrong

Should be fine regarding passing mot.
noise level will be minimal I'd say.
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Last edited by stamina_daddy; 13 January 2018 at 10:27 AM.
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Old 13 January 2018, 10:32 AM   #3  
jaygsi
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Should work fine. I'd just replace the down pipe with a 200 cell sports cat.
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Old 15 January 2018, 12:55 PM   #4  
JoeB
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Cheers for the input chaps !

I have been getting all sorts of conflicting info. tbh i dont currently have the spare funds for a remap, so i was hoping that by leaving the downpipe as stock, it wouldn't require one. However dont want to run the risk of any engine damage so may set about simply finding a replacement cat.
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Old 18 January 2018, 10:03 AM   #5  
Cambs_Stuart
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I believe there is a lambda sensor in the cat which looks at long term fuel trim, so the car should run ok without a re-map for a while, but I wouldn't advise doing more that a hundred miles like that. It may not even throw a CEL error.
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