fat_boy

iTrader: (1)

what is the difference between the two???
cheers

chocolate_o_brian

iTrader: (22)

Nur Spec-r is a catback system (backbox and centre section). It's 3" straight through and tapers down to 2.5" near the downpipe connection.

Nur Spec-s is the backbox only. The pipe work is still 3" but tapers down to 2.5" where the backbox meets the center section.

HTH

53

iTrader: (41)

^

Also...

NurSpec S doesn't come with a bung and rocks a db of 92-96db
NurSpec R does come with a bung and rocks a db of 96db bunged and 105db open.

fat_boy

iTrader: (1)

so dose that mean a nur spec r back box wont fit straight onto a 97 sti jdm original centre cat pipe ????

53

iTrader: (41)

Do you mean centre silenced pipe or the short cat pipe ?

Nurspec R couples to OEM Short cat pipe, NurSpec S is a Back Box and therefore fits to the OEM centre pipe (long resonated/silenced section).

fat_boy

iTrader: (1)

dont know i have brought a nur spec back box only and wondered weather it would fit straight on the exhaust i have on at the mo it the standard sti one on a 97 jdm sti
GC8D4EDif that helps lol

chocolate_o_brian

iTrader: (22)

No, it won't. The pipework off a Nur Spec-r backbox doesn't taper to 2.5", it's 3" true. All Impreza standard systems for your age were 2.5", so unless the standard centre section was modified to fit 3", you're buggered. Unless ofcourse you bought the Nur Spec-s, which is a straight fit.

http://i1.ebayimg.com/02/i/001/42/77/cddd_1.JPG
The above is a Nur Spec-s backbox. See where it tapers to 2.5" where the gasket fits?

http://i6.ebayimg.com/02/i/001/03/5a/e8ef_1.JPG
The above is a Nur Spec-r catback system. See that the backbox doesn't taper to 2.5" and remains 3" all the way through. the 2.5" taper is where the centre section would meet the downpipe.

Can't really make it any simpler than that fella, sorry.

53

iTrader: (41)

You knows more than me in respect to the box you bought. If its an S (classic fitment) it will, if its an R it won't.

fat_boy

iTrader: (1)

so as long as i got a de cat pipe that is 3" one end and 2.5" the other end it would be ok?

53

iTrader: (41)

Dude seriously ? Backbox or cat back ?

fat_boy

iTrader: (1)

no what im saying is if it is the r and its 3" i would have to get a centre de cat pipe that is 3" one end and 2.5" the othr then it would all fit

53

iTrader: (41)

Correct

fat_boy

iTrader: (1)

cool wel i just got off the phone to a bloke i kno and he is gonna knock me one up ready for monday so least thats sorted lol
cheers for your help guys ow well i was gonna have a quiet system leaving the cat in but ow well it looks like it will just have to come out lol
(i love my neighbours)

chocolate_o_brian

iTrader: (22)

Glad your sorted fella. But really you did make it more complicated then you needed too

Putting a picture up of the backbox you have would have certainly helped.

fat_boy

iTrader: (1)

i would but it only got posted today and its off another user so havent got a pic of the pipe lol else i would of
but cheers for the help Ben