jiffthejiffmanjaffa

iTrader: (10)

Hi guys,

I've got a standard Impreza 2000 turbo (As a side question what version would that be? V3 or V4) the standard exhaust is looking a little ropey and as I have plans to increase the power to around the 330bhp mark I was think I best get a decent exhaust.

But... after reading so many threads on the subject I'm well and truely confused.

I was going to go for a Haywood and Scott bell mouth decatt down pipe and a 3'' decat system finishing off in a single 3'' oval back box by revolution.

What do I do come MOT time though regarding the emissions and more important to me (I'm sure I can find a friendly test centre) do I go for 3'' or 2.5'' centre, 3'' or bigger back box?

I want a nice sound but nothing really more than standard, but at the same time note restrictive, I might as well go for a standard item if that were the case

Any advice will be very much appreciated.

KAS35RSTI

iTrader: (73)

What year is you UK 2000? H&S is a good choice & the blitz NUR spec is also good but maybe abit loud for you. Its always hard to dodge emissions unless you know garage that are decat friendly.

jiffthejiffmanjaffa

iTrader: (10)

My car is a 2000 reg.

KAS35RSTI

iTrader: (73)

It should be a Version 5 if im right.

digga

iTrader: (1)

i've got a 3" full decat system from revolution on my '00 uk turbo dont think it overly loud,,,had mine fitted by tfs racing apparently not a great fit and had to make me up a bit for true 3" but other than that looks and sounds the part

jiffthejiffmanjaffa

iTrader: (10)

SOoooooo 3inch or 2.5inch? Any more opinions?

lomas the great

3" defo

jiffthejiffmanjaffa

iTrader: (10)

Whats the benifits of a 3'' over a 2.5'' and vice versa?

53

iTrader: (41)

2.5" mate no question !

I have a 3" decat (for no other reason than I had one) mated to a reducer 2.5" centre and H&S scoobysport BB. 1995 classic c.320/320. H&S recommend sub 350 to go for 2.5 and over that the 3". At the 330 mark you would gain little to nothing from running a 3" except extra noise and cost. FWIW I have run a 3" on mine and it is more torquey with the 2.5.

In addition on my MY06 STi I run a H&S Sports cat/to full decat to Nurspec BB with the important part of the system being 2.5". 335/375.

94bd, without the antilag obviously !

YouTube - Simtek Antilag and Launch Control.wmv

GazTheHat

I would go for 3". I bought A 2.5" thinking i wouldn't need more, but then inevitably had to change it when i wanted more power. Buy once.

chris-RB5

a version number is only alocated to the sti's, if your car is a 97 reg it's a my97 if it's 98 reg it's a my98 and so on (my= manufacturer year)

joz8968

iTrader: (13)

Being pedantic, I think it actually means "Model Year" (but ultimately amounts to the same thing)

chris-RB5

yes your right you are been pedantic, but also correct.

joz8968

iTrader: (13)

lol

jiffthejiffmanjaffa

iTrader: (10)

So the 2.5 is more torquey than the 3 under 350. Best get me a 2.5 then by the sounds of it.