smi2ml

HI I HAVE JUST BOUGHT A SUBARU WRX STI 2007 2.5 TURBO, BUT IT DOES NOT MAKE THE CLASSIC BURBLE NOISE LIKE MY OLD 2002 SUBARU IMPREZA? DO YOU KNOW WHY THIS IS AND WHAT DO I HAVE TOI DO TO GET THE BURBLE NOISE ?

tubbytommy

iTrader: (20)

has it got equal length headers?
its the unequal lenght ones that give it the burble, jap cars have equal length and no burble.

smi2ml

OH i see no its definatly a UK spec car, how would i know if it has equal lenght headers? and if it does have equal length headers then can i buy unequal ones for it?

BrownPantsRacing

iTrader: (6)

Think all the 2.5's have equal length as standard now. My UK 2006 WRX has them.

g7prs

iTrader: (5)

Is it still using the standard exhaust system?

BrownPantsRacing

iTrader: (6)

I changed the whole exhaust from the turbo, left the headers and it sounds like a proper scooby now!

smi2ml

oh i see, so can i purchase unequal lenghth headers for my subaru 2007 sti?

Don Clark

It's interesting then that my MY11 WRX STi Saloon has UN-equal length headers and was very quiet with standard exhaust.

All 2.5's have the equal length header SUMP fitted as standard .

Here's an equal length header set up (albeit twin scroll)


OEM manifold..... wrapped and minus part of its heatshields




If you want the burble back I expect you will need to invest in a new cat back exhaust as a minimum.

smi2ml

ok thanks for the info !

scooby_dobby_doak

I had a test in a 2.5 56 plater wrx before buying my 2lt wrx (55 plater) and it sounded sooo queit - no burble at all so i thought it was something to do with the 2.5 engine (at least now i know the reason behind it, cheers lads!)

SPIKE LIKE MIKE

BLITZ NUR SPEC S........

cster

I think if you get another back box (eg Prodrive) you will get the burble.
My 06 STI (UK spec D) definately has unequal length headers, but the original exhaust system was muffled to death.

L.J.F

iTrader: (31)

Change the centre pipe and backbox to regain the burble.

jtonkins

iTrader: (1)

surely there all the same?? when i bought my02 that had standard twin exhaust and was really quiet with no burble changed the exhaust and hey presto

si2000

iTrader: (8)

It's the exhaust manifold (known as headers on an impreza) that denotes whether it has the burble or not. The exhaust system just denotes how quiet/loud it is.

TonyBurns

iTrader: (3)

Anything not twin scroll turbo is unequal length, twin scroll turbo is equal length (turbocharged cars only of course )

Tony

Tomwrx

iTrader: (54)

+1

i did this on my hawkeye,afterburner centre and backbox,