Murph86

iTrader: (2)

Guys im wanting to get a full 2.5" exhaust from turbo back with no cats but i want a silencer on the centre pipe.

My question is can i use the standard Subaru centre pipe seen as its 2.5" bore with a silencer on it or is there something wrong with doing this?

My plan is to run a H&S or Prodrive back box with 2.5" bore decat pipes and standard centre pipe then remap.

Can anyone see a problem with this and if so what?

Also my Nur spec R is for sale in the general section.

Thanks

powerwrx

iTrader: (11)

i cant see an issue with running the standard resonated centre section both the prodrive and H & S backbox will attach to it.

the prodrive will be the quieter of the two but to be honnest..if you replace the resonated centre section with a deresonated one there wont be much difference in noise only slightly, so you may aswell get a full system

Murph86

iTrader: (2)

What isthe benefit of a full system then?

I think i'll do the above and then replace the centre section just for the hell of it when i have spare cash!

RED2

if your decat from the turbo back you're going to have to replace the cat in the up pipe for a decat aswell if you went for a sportscat down pipe it could stay

powerwrx

iTrader: (11)

a full system, including decats will increase the bhp when combined with a remap, you will see a big (noticeable) difference in power and torque,and the full system will flow the gasses much better.

beware though, decatting will increase the volume of the exhaust

powerwrx

iTrader: (11)

i still have the origional cat uppipe on mine with a decat downpipe, but if you do decat the uppipe the boost can be increased even more

Murph86

iTrader: (2)

Yeah i know which pipes to replace ad that de-cating will make it louder but thats my plan so far, im looking at some prodrive ones on ebay but they all want collecting from wolverhampton and to be honest i cant be bothered.

RED2

i was led to believe you should decat the uppipe aswell for safety reasons ie the cat disintergrating under higher temps and going into the turbo

powerwrx

iTrader: (11)

ScoobySport - Performance Exhaust Systems for the Subaru Impreza

have you had a look at these, supposed to be the best flowing exhaust for the impreza

powerwrx

iTrader: (11)

that can happen but if its mapped safely for the set up you have then it shouldnt be a problem.

stunning car btw RED

RED2

cheers mate

Murph86

iTrader: (2)

Have had a look at the Scooby sports site, look really impressive actually, think i might go for the back box and down pipe, can i de-cat and then remap or do i have to wait untill i can fford remap and then put them on ready for it?

I heard you can't de-cat untill your ready to remap or????

powerwrx

iTrader: (11)

you can but it can cause issues like over boost and and fueling issues..ide reccomend a remap asap after decatting if not at the same tile.. you may get the CEL lighting up on the dash too (i didnt though)

Murph86

iTrader: (2)

Sweet, i'll buy the peices when i can and not put them on untill remap!!

powerwrx

iTrader: (11)

nice one mate, glad i could help

powerwrx

iTrader: (11)

ide suggest an upgraded fuel pump too when you remap...walbro 255lph

Murph86

iTrader: (2)

F*cing hell, i can see this bankrupting me very quickly ha ha.

How much is a new fuel pump?

Thanks again for everyones help with this!

Murph86

iTrader: (2)

Just had a look, there quite cheap actually, will have to do this!

powerwrx

iTrader: (11)

you can get them between £65 - £80 ish...its recomended to upgrade to to keep the fuel pumping to the requirments after the remap.

fitting the fuel pump isnt all that hard just go onto www.jollygreenmonster.co.uk and there is a step by step guide on how to change it yourself. i did my own

Murph86

iTrader: (2)

Excellent, once i decide on a new exhaust i will be putting in loads of overtime at work to get £500 together then remap & fuel pump. then i'll take my tim to decide my path from there!!

joz8968

iTrader: (13)

He says this AFTER getting a Scoob???

Murph86

iTrader: (2)

Well i expected mild bankrupcy but with my wish list i'll soon be up there with northern rock ha!!