leeroywrx

iTrader: (10)

my mate and me both have nur specs and are considering making it a genuine 3" straight through and doing away with the 2.5 flanges.is it worth doing as i think it is as 3" straight through has got to flow better than the original?has anyone done this already?

chrisdicko

iTrader: (21)

Depends what power you want really? But it wouldn't hurt doing it. I'm running 430bhp, and still have a 2.5" centre section.

I will be going to a full 3" system though very soon!!

Anger

iTrader: (4)

I did it on my old Ra and have also on my current Newage STi.... both running 450bhp

leeroywrx

iTrader: (10)

when i spoke to jgm he had a 2.5" exhaust and made 416 bhp.when he changed it to a 3" it made 451 bhp with the same mods.thats why i was thinking of taking out the only piece of my exhaust thats 2.5".also thought it would make it a little bit louder

leeroywrx

iTrader: (10)

did it make it any louder anger?

chrisdicko

iTrader: (21)

From when JGM said then, definitely do it!

ratboy

iTrader: (4)

Yeah,have had the 2.5 bit removed from the nurspec.
Only cost £30 all in so no big deal with expence.
Havent got any figures yet though with the difference.

Anger

iTrader: (4)

A bit louder if possible

WhiteWagonMan

iTrader: (34)

i cant see how a 2.5 inch piece which is only about 6 inches long where the down pipe joins the center section,will make any noticeable difference in performance or alter the noise level.i would also like some info on this from anyone who has done this mod to a full 3" nur spec exhaust,or from anyone who knows if converting this small section of 2.5" pipe to 3" will make any difference at all.

no1nutter

iTrader: (1)

makes every bit of difference, as effectively the exhaust may aswell be 2.5" the whole way through,

leeroywrx

iTrader: (10)

That's exactly what I thought mate.3" straight through has go to be better than with a narrow bit in the middle

kiranbaloo

iTrader: (9)

mine went from 420-445 by doing this.If you look at the 2.5"flange it is to fit into a 2.5" centre so the actual bit is nearer 2.25".A very worthwhile change in my opinion..

leeroywrx

iTrader: (10)

thanks for the replys.looks like we will both be getting them done then

WhiteWagonMan

iTrader: (34)

cheers for the replys fellas,thats convinced me now and deffo getting the 2.5 flange removed and replaced with 3"..MUCHAS GRACIAS AMIGOS.

See told ya i was right Lee,..PMSL MATE.