All Things Mk5 > Performance Modifications
Pre Cat removal
vRS_Pagey:
Good results there, all academic for me now as I have secured a deal on a miltek dp/sports cat! :happy2:
johnhol78:
I did mine a while ago though I'm confused about the Turbo Bolts?
I literally took out the inlet bolts......just behind the actual engine....
When this was off the pre cat was right inside.
Are these the bolts you're talking about?
Also is removing the pre cat anywhere near a new downpipe for Stage 2? What's the differences? Thinking of having the Cat removed and straight pipe put in which can be swapped at MOT time. Would this substitute a full Milltek for example?
vRS_Pagey:
--- Quote from: johnhol78 on September 29, 2011, 09:54:23 am ---I did mine a while ago though I'm confused about the Turbo Bolts?
I literally took out the inlet bolts......just behind the actual engine....
When this was off the pre cat was right inside.
Are these the bolts you're talking about?
Also is removing the pre cat anywhere near a new downpipe for Stage 2? What's the differences? Thinking of having the Cat removed and straight pipe put in which can be swapped at MOT time. Would this substitute a full Milltek for example?
--- End quote ---
If you remove the OE Cat in favour of a straight pipe (so decatting it) you will achieve the same as fitting a Milltek or similar down pipe, perhaps the performance will be slightly less due to the diameter of OE pipe which iirc is 60mm vs 70mm on the milly and 75mm on a pipewerx. You will need stage 2 software though and it will through up a CEL (stage 2 will sort this).
56OctyVRS:
I have done this on my Octy VRS and had Shark tweak my Stage 1 map over the weekend. I also fitted the SFS boost hoses and will be fitting a K&N Typhoon intake soon I got for a very reasonable price from a fellow forum member. Once done I will post up the results of the dyno run on the 17th October at Shark. With just the tweaked map, pre cat and sfs hoses the car really flies. It is effortless when accelerating and I can easily return 45 mpg on motorway runs.
Tfsi_Mike:
Is the SFS hose the same part as the Neuspeed ones? What's your thought on it?
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