I know this has been asked before, so sorry.

When booking my car in for the above works, there was doubt as to whether the car would have any problems at MOT time.

Can someone please clarify whether the car will have issues at MOT with the centre resonator removed.

The car is currently standard except for PPP.

Help please S/netters!

 

Centre resonator/silencer is about noise rather than emissions, both cats still in place, if so you will be fine.

 

The guy I was talking too (who I don't think was giving me his full attention) suggested that the two cat's remain standard on a PPP'ed car. However, I thought the PPP provided a sports cat?

 

PPP Cars only have the Prodrive sports Cat in the downpipe, by removing the centre section it'll have no effect on immissions as it's only a resonator not a Cat

 

Cool - Thanks gents.

Really looking forward to it now. How did you find your car after the de-resonated pipe being removed and re-mapped?

 

Totally transformed it to be honest, the power delivery is a whole lot smoother on and off boost, and it pulls all the way to the redline in every gear, 5ft feels more like 3rd with it's current map, and another good thing is it even does more MPG now lol.

The noise with the backbox and straight through centre section is just about right, not so loud as to draw attention to myself but enough rumble to bring a smile to my face everytime i drive it

 

Sound good.

What increase did you get?

 

Says he with the Afterburner ! Think I am weakening to its draw for the new car.

I had a sports cat and nothing else, no probs. Will have the same on the new car too. Centre section de-resonated/silenced gives you much more feel with the revs and removes the lumpy feeling.

 

I got Zak @ Mocom to map it with safety in mind (not wanting to stress things to much) and he got it to 257 BHP @ 252 FtLbs of torque,(at the wheels) he said there was more to come if i wanted it but the way it drives as it is suits me at the mo. I think there will be more mods to come in the future and Zak can play with the map as it goes along

 

I just spoke to Powerstation, where it's booked in to have the works done and they cannot do a de-resonated centre section?

How much will this affect performance and should I get this done somewhere before? I assume they cannot go to a n other supplier?

 

If they can't supply one then they can surely fit it, takes about 5-10 minutes for someone like powerstation !

Centre sections can be had from scoobyworld or Hayward and Scott. Most new are about 100 quid.

 

I am leaning towards buying one myself and asking powerstation or someone else to fit it prior to the remap to fit it.

Does anyone know of where I can get a de-resonated centre section to fit a PPP exhaust?

Many thanks

 

H&S, this is what I got on MY05 STI PPP, give them a call if you are unsure

Stainless exhausts manifolds headers

 

My afterburner one came from http://www.scoobyworld.co.uk/catalog/

 

I was told my JDM MY01 STI had two cats, one in the down pipe and one mid section. Was told to keep the mid section cat for mot's when i go cat free. Is this not right then???

 

What sort of gain is expected from remapping an UK STI with the PPP already fitted and a straight through centre section.Are you leaving on the Prodrive sports cat etc.

 

Won't get through an MOT with the New Age rear centre cat, at least I don't think so.

 

Phew, I'm doing the same as you 53wrx with my Spec D and was informed the afterburner centre section would not be an issue at MOT. All part of my D restoration and upgrade project.

 

The diagram on the scoobyworld website is useful here 53WRX.

I think I will give H&S a ring My only question is whether it's 2.5" or whether it's 3", the latter won't fit the ppp exhaust so In told. I don't want to upgrade to a 3" system due to the limited benefit not really justifying the cost.

Did yours fit onto the standard exhaust chriswsti05?

 

All I have is the H&S Sports Cat DP, the rest is straight though. Mine is a 4 piece system DP, rear cat/decat, centre and BB. You can get the DP made to include the rear cat/decat thus making it a 3 piece system. On the MY06 if you only buy the rear decat make sure it is specific to the MY06 as it is longer than the pre 06 models to allow for a shorter stock DP. So for example my old Prodrive rear decat would not have fitted. HOWEVER, it does become compatible if it is used with the H&S Sports Cat DP which I am told is longer than the DP on MY06 cars.

Well thats the plan next Thursday anywhoo

Also sticking with 2.5" for now, purely on cost basis as I already had the parts.

 

chriswsti05 did your H&S de-res centre section fit onto the standard exhaust and does anyone know if the exhaust from the MY03 to MY05 is different?

Thanks

 

As far as i'm aware they are exactly the same

 

Cool, H&S tell me it should fit

NOW PURCHASED.

Remap next Sat by Powerstation.

As I had to cancel it first time round I can't wait.

thanks for the help gents.

 

JDM STI has one cat in the downpipe only. The thing in the centre section is a resonator.

REMEMBER - you need to buy a classic exhaust to fit this car!!!

 

??? Classic exhaust

 

Yep afraid so - the JDM has a 3 piece the same as the classic (but still needs the new age back box) downpipe and centre are classic

I bought and tried to fit a new age exhaust and found that the centre pipe was 4 inches too short !!!

Easy fix though, just have to remember when ordering (Scoobyworld et al are fully aware)

 

This is for a UK STi not a JDM

 

****!!
I've bought all 3 sections now. Downpipe and back box are newage. not sure about the centre part
I suppose you don't know how long the mid section has to be before i take it to have it fitted and avoid looking a bigger *** than i now already do

 

Somebody put me out my misery.......Please!!!!

 

Jamie,

If you have 3 new age parts then you might just get away with buying the short bit of pipe between the DP and CP where the UK models have an extra cat. This should then turn your JDM layout into a Euro layout (i'm assuming here that the exhaust hanging points are all in the same place)