So got my decat down pipe and yesterday my haywood and scott de res centre section turned up , will be fitted and mapped next week the question is will it bring me back some rumble to the pants stock sound of the new sti or is this solely down to the back boxes ? And input would be great.
I'm hoping by getting rid of the two cats and the massive resonator on centre section this will help ?

 

I've only changed the y pipe, and the 2 back boxes, and it grumbles magically now.

Was a bit loud to start with, but seems to have settled at a db just below ear bleeding.

 

What back boxes did you fit ?

 

Dunno, the garage made them I believe. Had the 340 upgrade from Mangoletsi, was under the impression they fabricated them as you could pretty much have what you want.

 

*They, being ACSpeedtech, not the dealer.

 

Scoobyclinic have done a lot of testing with exhaust systems on the 2015 STI, Kev did a big write up on 'ukscoobies', but that forum has closed and a lot of good info has been lost.

Give the clinic a ring for some advice

 

I have a Tomei Expreme Ti titanium system coming off my MY16Sti - looks amazing & loudest thing ever - check out the for sale in the next week or so. A

 

Sounds interesting mate thanks , what you looking for it ? I'm only after the quad boxes as I have the rest.

 

Are you not worried about voiding the warranty?

 

I have a Haywood and Scott Quad from MY11 Saloon, according to H&S they will fit MY14 upwards. 3.5 inch rolled tail pipes

 

Mine was a dealer approved upgrade, not planning on doing anything else to it. Only get 3 years on the STi anyway, and I'm halfway through that now.

I'd have been a bit worried doing it otherwise, would have waited until out of warranty.

I had the offer of a H&S system from a MY12 for my MY14, but contacted them first to check fitment. They confirmed that the back boxes will fit, but the y-pipe wouldn't, it is very slightly different.

 

Jesus's a new poo.5 with no warranty...
You're a very very brave man.

 

Single exit cat back - resonated.

 

Not according to my mapper who btw has 20 + years tuning subarus , and why no warranty , re fit old exhaust and re flash ecu problem solved.

Big h what you wanting for those back boxes ??

 

PM'd

 

Would be interesting to know who your mapper is 'cus the engine in the new cars is already getting itself a less than positive reputation.

 

That will be because it's the same old engine dating back to 2008

 

He has several running around the 350-360 and some more on stock internal with no probs yet , I know a gamble but I'm lucky as I do few miles.
And I paid for the car and il bloody do what I want with it !! ..... But yes I'm aware of the now re named poo.5 but as said if kept around the mid 300 and not silly boost its not to bad. Well hopefully

 

Sorry but that's incorrect. Working for a dealer I know first hand.

Once that ecu has been flashed the CVN & CID numbers change, Even if flashed back to standard the Numbers will change again & wont tally up with the original factory numbers
Warranty Invalid in this instance