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Model specific boards => Golf mk4 => Topic started by: jamie16v on 19 December 2010, 21:25

Title: standard OEM cat restrictions
Post by: jamie16v on 19 December 2010, 21:25

as above guys. whats restricting the standard cat setup?...

Title: Re: standard OEM cat restrictions
Post by: tech1889 on 19 December 2010, 21:36

both the cell and the tube is restricting..

Title: Re: standard OEM cat restrictions
Post by: northeast_gti-t on 19 December 2010, 22:18

exactly the core of the cat also the narrow opening from the turbo to downpipe and the swan neck leading to the cat take a look at for example a miltek sports cat and downpipe 200 cell cat with 3" opening at turbo end which is a nice smooth flow into the cat rather than having the swan neck to restrict gas flow  :wink:

Title: Re: standard OEM cat restrictions
Post by: jamie16v on 19 December 2010, 22:26

i just had the idea of using the cell from my oem unit inside my decat to build a DIY sports cat to save the swapping over mot time. if they were the same diameter that is..

Title: Re: standard OEM cat restrictions
Post by: richw911 on 20 December 2010, 10:33

The pics speak for themselves

 http://www.golfgtiforum.co.uk/index.php?topic=87345.0  :shocked: