Exhaust?

[SteveSAS]

Hi, before getting a stage 1 remap would it be beneficial to get a better exhaust for my S3 & which one is best?

Have seen some downpipes that do away with the cat, is this the way to go & does it affect the MOT in any way?

Thanks for any advice,

Steve

 

[g60leigh]

Not sure if beneficial for stage one. But definitely beneficial generally.

I have a Milltek cat back system and am very happy with look sound and quality of it.

Also have a relentless manifold and down pipe including sports car which offer a nice improvement in performance but the quality is hit and miss.

 

[SteveSAS]

Thanks for your reply, so you have a sports cat rather than standard?? I was looking at a stainless steel exhaust decat downpipe from toyosports. Does this mean the I will have no cat at all on exhaust & what is the difference between sports cat & no cat?? One for the road one for the track?

 

[SteveMcB]

I went for a 100 cell sports cat on a subaru gb270 and it just scraped by on emissions. Not sure how this would compare with an s3 but don't think they will be that different. 200 cell is slightly more restrictive but safer at mot time, I dont think it will pass an mot with a decat. Stainless Creations made me a bespoke 3" system which was very reasonable compared to an off the shelf unit

 

[Lavis89]

If you decat a car it will usually fail the MOT on emissions (unless you have a friend who happens to do MOT tests)

 

[Tovs]

Hi, before getting a stage 1 remap would it be beneficial to get a better exhaust for my S3 & which one is best?

Have seen some downpipes that do away with the cat, is this the way to go & does it affect the MOT in any way?

Thanks for any advice,

Steve

Relentless Downpipe with miltek catback .

De Cating you risk a lot, its illegal to have a straight through, so if you get pulled over and the happen to check it, uh oh. Plus as stated it'll fail MOT

It more comes into play when going to try head for stage two, don't think its much gain on stage one, as you can pretty much remap stage one as standard.

As stated again, it'll certain sound nicer, and help towards performance a bit

 

[SteveSAS]

Cool guys, thanks for clearing that up for me.

Will stick with a cat then as don't want MOT hassles. So is the choice to leave the standard cat alone and replace the rest of system or to have a sport cat as well?? What are the extra benefit of that?
Also the the two common systems for our cars are Miltek & Jetex, is this all?? Which is best?

Thanks
Steve

 

[m19lte]

As a general consensus on here your prob best off getting a full exhaust done, with a 3" downpipe, then a decent flowing air filter (either panel or cone) 'then' get a custom map-to make the most out of your mods, r-tech, badger 5, unicorn motor developments all do custom mapping and seem to be well regarded on here.
People seem to favour miltek (but they come with a price) I've heard cobra, blueflame well recomended, or maybe a custom exhaust ? Power flow, long life exhgausts !?! They can make up decat replaceable sections.

 

[SteveSAS]

Thanks for that info. Was looking around nearest places to where I live (Dartford, kent) & have found flash mapping in bexleyheath & AMD in essex that can also do deals on exhausts filters etc as well.

 

[<tuffty/>]

http://www.audi-sport.net/vb/a3-s3-...ps-everything-you-need-know-about-remaps.html

<tuffty/>

 

[SteveSAS]

Thanks for that advice lads, yes Miltek for whole system very expensive, anyone know anything of this Vortex system? Edd China's name on it lol