Author Topic: Miltek Highflow Sports Cat  (Read 111 times)

Offline killarag

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Miltek Highflow Sports Cat
« on: October 12, 2017, 08:31:41 AM »

I just bought and received a Miltek 3” sports cat and currently have a stage 1.

I am worried that I will get an EML if I install it now and not stage 2 it (cant afford the stage 2 for a while)
Got my MOT coming up VERY soon so obviously don’t want the car to fail.

Is it likely that my EML will come on?


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Offline Dan_FR

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Re: Miltek Highflow Sports Cat
« Reply #1 on: October 12, 2017, 08:39:31 AM »
Why not fit it after the MOT....

There's a chance the EML will come on at some point for a catalyst efficiency code, but the car is fine to drive like that until you get it mapped. Don't be tempted to fit a spacer to the second lambda in order to remove the EML - that lambda is used for a lot more than just catalyst performance and needs to stay as it is
TFSI... Revo Stage 2+... . WMI.... VCDS HEX + CAN, MPPS, VAG Commander & VAG tacho - South Wales

Offline Pudding

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Re: Miltek Highflow Sports Cat
« Reply #2 on: October 12, 2017, 11:00:57 AM »
Common problem with sport cats.  Even with the rear lambda coded out to disable the money light, you may struggle with the MOT.  My 200 cell sports cat even when new only just scraped through with 0.1%, which is the pass limit for EU4 emission regulated cars.  OEM cats usually measure ~ 0.01%.   

I'm pretty sure MED9 post-cat is monitoring only.  ME7 post cat O2 could over-ride the primary O2, which is why R32s & S4s (2.7t) lost responsiveness in the part throttle when binning the cats.  I don't notice any change in behavior at all pulling the rear O2 in my ED30.
Black Edition 30 with manually selected cogs, a beefier clutch, some extra boost and them Whiteline thingies, otherwise standard.