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Thread: Relentless 3" Downpipe, decat and Powerflow System Fitted! Lots of Pics!!!

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    Benjiman46's Avatar
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    Relentless 3" Downpipe, decat and Powerflow System Fitted! Lots of Pics!!!

    First of all, I would like to say a MASSIVE thank you to all the guys at Top Gear Performance who carried out all this work and put up with me taking loads of pictures :D

    The first thing to do then is remove the old, heavy, restrictive exhaust...








    Then, instead of dropping the subframe, and seeing as my flexi was already knackered and needed replacing, we decided to butcher the old downpipe to remove it, chopping it just above the part where it splits in two.







    Look how restrictive this part is :S




    The next step was to make access to the top of the turbo/downpipe area.

    Remove the charge pipe.



    Then you will have a bit more room to reach the downpipe to turbo nuts.



    Removing the top one is easy enough



    But the next one required this special tool we threw together...



    The last one should then be on the bottom and clearly visible (makes sense to leave the easiest till last)



    Downpipe removed! (After about 5 hours)



    Look at the comparison between old and new... Unleash that turbo!



    Fitting the new downpipe was a lot easier and took only an hour to do, but we had to chop the hanger off the new downpipe to allow us to fit it (as we didn't drop the subframe) Don't worry, it gets welded back on later...



    All fitted and nicey nice Not much room at all though!



    We used new loc-nuts as the old ones were nyloc nuts (very stupid idea on a turbo) hence why it took so long to remove them, the nylon had melted into the threads.



    Now to fit the de-cat and the rest of the system!!! I was very excited at this point :D









    The first part of my system was bent into shape and offered up to the car...



    These were the boxes I chose (Didn't want it too loud)



    First box tacked in place



    Second pipe bent into shape and tacked in place



    The final stages of bending for the back box



    Back box offered up and tacked



    To make the 180 degree bend, two 90 degree bends were TIG welded together to make a nice pretty finish (and optimum flow) Then the t
    ailpipe offered up and tacked in place...



    Constant checks were made to see if it was level and to ensure the exhaust didn't hang too low and f
    inally the whole thing was removed and precisely welded to ensure perfect sealing...




    The exhaust was then put back on the car, level checked, then all the hangars that were needed to utilise the existing rubbers were welded into place and it was finished!!!



    Later that day once the car was thoroughly warm, I thought I'd make a short video to demonstrate the sound... Beautiful

    Audi S3 3" Downpipe, Decat and Powerflow Exhaust - YouTube

    Thanks for viewing and I hope it was educational or informative to a few people on here planning on doing this Big shout out to Top Gear Performance in Doncaster Top Gear Performance Doncaster

    Ben

    1.8 litre porsche eater!

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  3. #2
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    How much did it all cost ya mate?

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    "Stick a V8 in it!"

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    What size is the exhaust? 2.5"?

    Shame they havent used a proper mandrel bender

    You need to do a video of the car on the move, rather than just revving while stationary. Stationary revving always sounds a bit limp and ghey as theres no load on the engine.

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    Quote Originally Posted by Nogmeister View Post
    How much did it all cost ya mate?
    Hiya mate, for fitting the downpipe and decat, and making and fitting the custom exhaust it was £508, I bought the downpipe as well as a manifold from relentless for $450 (£296) so add a percentage of that to the £508 for the total cost

    Quote Originally Posted by aragorn View Post
    What size is the exhaust? 2.5"?


    Shame they havent used a proper mandrel bender


    You need to do a video of the car on the move, rather than just revving while stationary. Stationary revving always sounds a bit limp and ghey as theres no load on the engine.
    It is 2.5" yeah, They use a different type of pipe bender, but I'm not sure what it's called... Just as good and plenty enough flow for my needs

    and I'll be getting some drive-by videos done soon to show the sound properly, I only got the exhaust done last week

    Ben

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    exactly the same set up i have mate. i have a sports cat tho. i'm impressed with mine. how you finding yours?
    S3 8L Ming Blue 273bhp & 294lbft h


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    check it out!


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    looks good ben

    Audi s3 goodwood green, BAM, n249 delete, 80mm TIP, s2000 air-filter, new turbo, ap coil overs, lots of poly bushes, 15mm spacers all round rolling on 18'' RSTT's

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    Quote Originally Posted by JtotheD View Post
    exactly the same set up i have mate. i have a sports cat tho. i'm impressed with mine. how you finding yours?
    Nice one It's awesome pal, pops and bangs alot without the cat though lol But I don't mind that

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    Quote Originally Posted by s3clarke View Post
    looks good ben
    Ahh cheers dude

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    Looks like a tasty exhaust system.
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    look great and sounds great mate does the downpipe touch the subframe once u cut the hanger off
    350bhp & 316ftlb BBT new k16 7+7 blade hybrid turbo, Welly cooler, jetex filter, relentless ported v3 manifold 3" downpipe & de-cat, liquid gauge, r32 rear arb, AGU ported and polished Head, 550cc injectors, kw v2 Coilovers, s3dave tie bars & heat sheild, milltek cat back, I.E forged rods, brembos, inline fuel pump, v3 badger 5 tip, devils own WMI kit, AGU pistons, rear grooved discs & brembo pads, ds2500 pads & EBC ultimax disc, stack boost gauge

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    Quote Originally Posted by s3gazz View Post
    look great and sounds great mate does the downpipe touch the subframe once u cut the hanger off
    Well it did, but it got welded back on when the rest of the hangars were made up so now it doesn't. I've noticed it vibrates when turning and accelerating, which probably means it's touching the subframe every now and again.. Nothing a red dog bone mount can't fix

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    em thought it might mine does now but is the v1 thinks its pipewerx for me
    350bhp & 316ftlb BBT new k16 7+7 blade hybrid turbo, Welly cooler, jetex filter, relentless ported v3 manifold 3" downpipe & de-cat, liquid gauge, r32 rear arb, AGU ported and polished Head, 550cc injectors, kw v2 Coilovers, s3dave tie bars & heat sheild, milltek cat back, I.E forged rods, brembos, inline fuel pump, v3 badger 5 tip, devils own WMI kit, AGU pistons, rear grooved discs & brembo pads, ds2500 pads & EBC ultimax disc, stack boost gauge

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    Quote Originally Posted by s3gazz View Post
    em thought it might mine does now but is the v1 thinks its pipewerx for me
    I'd go for the V2 relentless mate if it was my money, if you get them direct from the USA and they're very cheap.

    Just ordered a red dog bone mount poly bush off the 'bay

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    is this the mount u went for as i want to change mine but it says diesel in brackets?

    POWERFLEX AUDI S3 MK1 TYP 8L 4WD 99>03 FRONT ENGINE MOUNT DOG BONE (DIESEL) PFF8 | eBay
    nice 1

    Audi s3 goodwood green, BAM, n249 delete, 80mm TIP, s2000 air-filter, new turbo, ap coil overs, lots of poly bushes, 15mm spacers all round rolling on 18'' RSTT's

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    Quote Originally Posted by Benjiman46 View Post
    I'd go for the V2 relentless mate if it was my money, if you get them direct from the USA and they're very cheap.

    Just ordered a red dog bone mount poly bush off the 'bay
    thanks mate iv already got the red dog bone mount on just sick of the vibrating noise.

    what v mani u running im after the v3 when its out
    350bhp & 316ftlb BBT new k16 7+7 blade hybrid turbo, Welly cooler, jetex filter, relentless ported v3 manifold 3" downpipe & de-cat, liquid gauge, r32 rear arb, AGU ported and polished Head, 550cc injectors, kw v2 Coilovers, s3dave tie bars & heat sheild, milltek cat back, I.E forged rods, brembos, inline fuel pump, v3 badger 5 tip, devils own WMI kit, AGU pistons, rear grooved discs & brembo pads, ds2500 pads & EBC ultimax disc, stack boost gauge

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    Thanks for the pics, helps to give me an idea of what I'm getting myself into when I get around to fitting my Pipewerx downpipe/cat and miltek system...looks like I should have the grinder/dremel handy!
    > S3 225 (03) - OEM+
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    Looks sweet, I had a 3" custom made for mine and it sounds superb, even though its a Diesel lol

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    quick question. having not fitted a cat does the EML not light up????

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    Quote Originally Posted by jamie408 View Post
    quick question. having not fitted a cat does the EML not light up????
    it will do eventually, mine came on after a week. doesnt cause problems though and can be coded out

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    Your near side tyre is the wrong way around.
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    Quote Originally Posted by superkarl View Post
    it will do eventually, mine came on after a week. doesnt cause problems though and can be coded out
    coded out using VCDS??

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    Quote Originally Posted by jamie408 View Post
    coded out using VCDS??
    no in a remap. any decent tuner could do it

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    thanks mate

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    Quote Originally Posted by S3 Rav View Post
    Your near side tyre is the wrong way around.
    No it's not mate. Vredstein Ultrac Sessanta tyres are made that way.

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    Quote Originally Posted by s3clarke View Post
    is this the mount u went for as i want to change mine but it says diesel in brackets?

    POWERFLEX AUDI S3 MK1 TYP 8L 4WD 99>03 FRONT ENGINE MOUNT DOG BONE (DIESEL) PFF8 | eBay
    nice 1
    Thats the one mate, hold off until I fit mine though, I'll advise wether or not it fits and how annoying it is when fitted lol

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    Quote Originally Posted by jamie408 View Post
    quick question. having not fitted a cat does the EML not light up????
    On an APY engine (what I have), it doesn't have a post cat Lambda sensor, so it won't ever come on, on the AMK and BAM engines, it will though because they both have post cat lambda sensors.

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    Quote Originally Posted by S3 Rav View Post
    Your near side tyre is the wrong way around.
    And plus 1 on Ryan's post, very good diagram too, thanks

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    Quote Originally Posted by Benjiman46 View Post
    On an APY engine (what I have), it doesn't have a post cat Lambda sensor, so it won't ever come on, on the AMK and BAM engines, it will though because they both have post cat lambda sensors.
    ok kool in the process of geting a 52 plate s3 so what engine is that?? BAM??

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    Quote Originally Posted by jamie408 View Post
    ok kool in the process of geting a 52 plate s3 so what engine is that?? BAM??
    Yeah will be BAM, it should have a bit of a facelift.. Slightly different back lights and tiny bit different interior and badges.. OH... and 225bhp as standard

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    Quote Originally Posted by Benjiman46 View Post
    Yeah will be BAM, it should have a bit of a facelift.. Slightly different back lights and tiny bit different interior and badges.. OH... and 225bhp as standard
    happy days. its got white leather and 225bhp 4x4 and a cat back system 100.000 miles payin £3k for it the door cards look real nice i think with black and white leather

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    fantastic buddy...im over at exhausts uk on friday having a 3" downpipe and 200 cell cat itted to my tt225...getting it ready for big power


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    yeh im wanting get a downpipe too

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    Sounds very nice.....Where did you get your plates from mate??

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    Quote Originally Posted by jamie408 View Post
    happy days. its got white leather and 225bhp 4x4 and a cat back system 100.000 miles payin £3k for it the door cards look real nice i think with black and white leather
    Sorry for hijacking .......... £3k is a bargain! Bit too cheap I think, I'd get it checked by someone who knows s3, borrow a vcds and scan it. Fsh? Hpi clear?

    Use buying guide on here in stickies , cheers, Sean

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    Quote Originally Posted by s33nyboy12 View Post
    Sorry for hijacking .......... £3k is a bargain! Bit too cheap I think, I'd get it checked by someone who knows s3, borrow a vcds and scan it. Fsh? Hpi clear?

    Use buying guide on here in stickies , cheers, Sean
    hehe its not what u no its who u no tbh mate. its got FSH shed loads of receipts. body work is perfect and no fault codes. thats what you get when people fail to pay for a car mate. it is hpi clear aswell

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    Quote Originally Posted by Danny22 View Post
    Sounds very nice.....Where did you get your plates from mate??
    Got them from Dub Meister mate, they make them in Germany from genuine German plate materials and ship them over.

    Ben

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    Quote Originally Posted by Benjiman46 View Post
    Thats the one mate, hold off until I fit mine though, I'll advise wether or not it fits and how annoying it is when fitted lol
    cheers bud, seems decent priced if its good

    Audi s3 goodwood green, BAM, n249 delete, 80mm TIP, s2000 air-filter, new turbo, ap coil overs, lots of poly bushes, 15mm spacers all round rolling on 18'' RSTT's

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    Quote Originally Posted by s3clarke View Post
    cheers bud, seems decent priced if its good
    Yeah apparently they stop the engine rocking and make gear changes faster and smoother... But also increase engine vibration inside the car. Hense why I went for the red one for the diesel A3 and not the yellow one for the S3. They're awful for vibration apparently!

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    I was told either dog bone mount will wear in after few hundred miles and the vibration becomes a non issue


    8L S3, K04 HYBRID, PISTONS, RODS, FORGE DV, HOSES, AP COILOVERS, POWER TEC INDUCTION KIT, QUICK SHIFT, AMD CUSTOM MAP, CALIBRE VINTAGE 9/8x18 AND A WHOLE LOT MORE TO DO!!!

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    Quote Originally Posted by carl-1968 View Post
    Looks sweet, I had a 3" custom made for mine and it sounds superb, even though its a Diesel lol
    Could you do a video for sound purposes please would like to hear yours please

    Jamie

 

 
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