RAPID RABBIT

iTrader: (10)

Hi,
can anyone show me the difference between a equal length tubed header and a non-equal lenght tubed headers.
i know it sounds obvious but there are so many adverts out there and they all look the same?
there does not seem to be much difference in them.

RA95

when you say show you the difference are you looking for pictures of each type or are you asking for technical information on what the performance differences are?

Kjartan

Equal length usually destroy the flat four rumble , makes it sound awfull

scooby350bhp

not true, ive got an equal length on mine, ok it does take away the burble, but mine is a uk spec which made 290 bhp with an equal manifold, 3 inch straight through with de cat, blitz induction kit and vf28 turbo! running 12 psi so there are advantages to it

RAPID RABBIT

iTrader: (10)

Looking for a pic really.
i so don't want to lose the burble, best part of car lol
i've seen one for sale but it doesnt look like its equal but is advertised as one.
i take it you can get un-equal length tubular manifolds??????????
cheers

rossyboy

iTrader: (8)

Yes, you can. If you are looking for any less than about 340 bhp, then you dont need a tubular manifold at all. Get the standard headers ported and add a matching up-pipe and this will suffice.

If you really want tubular, then make you sure you go 3 bolt flange like gruppe s. It gives a much better seal that is less likely to leak than the 2 bolt flange earlier designs.

Having said that, my 2 bolt HKS headers are still fine with 2 gaskets in place to up-pipe.

The un-equal tubular give a rumble early on until about 3,000 rpm, but then all hell breaks loose and a noise many compare to a super bike happens up to the red line

RAPID RABBIT

iTrader: (10)

Hers's a pic of the one i seen.
is this equal???? they say it is.

gillyz20let

nope deffo not equal. this is equal length

frayz

iTrader: (7)

I think GT spec now do a set of equal lengths...

I'll be getting a set soon, i love the sound of equal lengths

silent running

They're definitely not equal.

RAPID RABBIT

iTrader: (10)

good.
i thought they did'nt look very equal in lenght.
love the burble noise....................

RA95

Equal length headers make a big difference to the higher RPM performance of the car, but work best with supporting mods like up/down pipes, full porting/polishing of headers, turbo and exhaust system to improve gas flow all round.

Sound is as described above, screams like a superbike from 3000-8000 rpm. Pulls hard all the way too, doesn't run out of puff at high RPM like standard system and sustains high boost levels.

The rookie

iTrader: (1)

[QUOTE=RA95;7071695]Equal length headers make a big difference to the higher RPM performance of the car, but work best with supporting mods like up/down pipes, full porting/polishing of headers, turbo and exhaust system to improve gas flow all round.
QUOTE]


Love to know how much porting you plan of the tubular headers.......

Simon

RAPID RABBIT

iTrader: (10)

i found these for sale in the states.

They certainly look good but are they any good?
it say's they fit these models;
02-05 Subaru Impreza WRX 2.0L Turbo H-4 (GDA,GGA chassis)
06-07 Subaru Impreza WRX 2.5L Turbo H-4 (GDA,GGA chassis)
04-07 Subaru Impreza STi 2.5L Turbo H-4 (GDB chassis)
05-07 Subaru Legacy GT 2.5L Turbo H-4
has anyone seen these befor and will they fit my classic 95?
hope you can help cheers

The rookie

iTrader: (1)

When Jap perfomrnace mag put similar on there Project Phoenix, its fair to say it wasn't a total success...

Plus sides - some extraction effect and better flow.
downsides - more lag due to a larger exhaust volume to fill pre turbo, it also appeared to come om boost at higher rpm which may be related to temperature losses.

Simon

RA95

my apologies I meant polishing/porting of heads, not headers.