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  1. Mk2 Engine, Exhaust and Induction
    I currently have a milltek cat back exhaust with the standard downpipe and catalytic converter. The downpipe flexi is blowing and both the downpipe and the cat are very corroded, so I need to replace them. I'm happy with the volume of the current exhaust and don't really want it any louder/more...
  2. Mk3 Petrol Engine, Exhaust and Induction
    Hi everyone! I’m very new to this site and have owned my Mk3 st since October now. I was wondering if anyone can help me. I believe there is a 3” cat back system fitted from a previous owner but I was looking at getting a relatively cheap solution to getting some more volume. Been looking at...
  3. Mk4 Exhaust "How-to" Guides
    I recently installed the Mountune downpipe and GPF and absolutely love it. I decided to do it myself for several reasons, mainly the cost of installation and gaining experience. The process took about 4-5 hours as I didn't really know what I was doing, and was figuring it out as I went along...
  4. Focus ST Mk4 Non Technical Discussion
    Hi there, does anyone have photos of the stock undercarriage of the MK4 showing the exhaust, GPF, downpipe, etc...? I can only find images online of custom exhausts, and even then not the whole undercarriage.
  5. Mk2 Engine, Exhaust and Induction
    I removed my original downpipe bolts today, went very well considering all the horror stories of snapped bolts. Got them all nice and hot with my MAPP torch and they all came out using decent fitting sockets and spanners, all from under the car without taking the heat shield off too so big...
  6. Mk2 Engine, Exhaust and Induction
    Hi all! Recently had my 3" downpipe fitted a week after running a 3" sports cat. The cat made a noticable difference in a good way but I cannot say the same for the downpipe! Running DSCI map by Dreamscience which supposedly will make use of the new downpipe & cat. As the car hits boost there...
  7. Mk2 Engine, Exhaust and Induction
    Hi all, I've only had my st a month now and want to start doing stuff to it. Hopefully doing the symposer delete this weekend and Monday I'm doing the resonator delete. I don't really want to spend masses of money or go over the top loud (yet). I also want the car to remain legal and pass mot...
  8. Focus ST Mk2 Non Technical Discussion
    Evening guys, im planning my next mods but not sure what order would be best to do them in. Currently im running miltek catback, dsci induction kit and a autotech stage 1 map. On my wish list is, intercooler, downpipe, sportcat or decat, and stage 3 map. wWhat im not sure on is what ones to...
  9. Mk2 Engine, Exhaust and Induction
    In the spirit of doing mods which the wife won't spot and keeping the budget small is this worth getting done, stupidly missed out on a S/H downpipe in the classifieds because I forgot to message the seller (doh) but there are loads around for reasonable money. Question is whether this will...
  10. Mk2 Engine, Exhaust and Induction
    I want to ask if somebody did this - put a 3" downpipe and decat(or sports cat) on a standart catback. I now have a 3" full custom made exhaust, with just one milltek 3" resonator(not the ultimate one, but smaller). It's kind of loud and it's not a problem now because it's not my daily driver...
  11. Mk2 Engine, Exhaust and Induction
    Cobra VENOM turbo back mini review. As there seems to be a lack of information regarding the system other than 'It's loud' and mostly just opinions from people who haven't run one I thought I'd post up a review of my own on how they are to live with. Let's get down to business, this is the...
  12. Mk2 ECU Remapping, Software & Tuning Packages
    Evening, yeterday, after having my airtec gen 3 i/c, 3 inch dp and decat and k&n panel filter fitted for a good month, i plugged in the stratagem ultra and remapped my car with mod c. So far extremley pleased with the results, no clutch slip, not too bad for spinning up in second (its been dry...
  13. Focus ST Mk2 Non Technical Discussion
    Hi All I have recently purchased a new car so am returning my ST to stock, parts for sale listed below, all prices in postage to your door; Bluefin Handset (reset needed) - £50 Mongoose 3" Downpipe and 100cell Sports-cat purchased and fitted by Pete at Demon Performance Centre - £130 for...
  14. Mk2 Engine, Exhaust and Induction
    Hi all I've had a cobra downpipe and 200 cell sports cat fitted to my existing dream science cat back this morning and it has brought up the orange engine diagnostic light on the dash board. Has anyone else running a cobra downpipe and sports cat had the same issue? Is there a solution 2 my...
  15. Mk2 Engine, Exhaust and Induction
    Hi all, Thinking about getting a new downpipe fitted. What's the best one to get? I want it to come with all the bolts and gasket etc. Also, how much should this cost to fit roughly? Would you say this is a good first modification to make? Thanks, Harry
  16. Mk2 Engine, Exhaust and Induction
    HI ALL OLD BOY ERE, IVE BEEN GIVEN A DOWNPIPE FROM AN 09 RS IS THIS ANY BETTER THAN MY STANDARD DOWNPIPE AND IS IT A STRAIGHT FIT AND WHAT SORT OF GAINS COULD I POSS EXPECT ? ANY INFO GRATEFULLY TAKEN ON BOARD. SORRY MK2 225
  17. Mk2 Engine, Exhaust and Induction
    Iv been told that if I get a new downpipe for the ST that I will have to change the engine mount bushes??? Is this true? Also iv been looking at different downpipes, currently have a milltek cat back and a piper decat, would there be any difference for sound/performance off a milltek compared...
  18. Mk2 Engine, Exhaust and Induction
    Hi I have a full scorpion exhaust system including decat, does this mean I will have to fit a scorpion downpipe or can I fit different makes? Cheers Rich
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