subaru8189

How much would the addition of uprated unequal headers affect the exhaust note? If at all? Cheers

banny sti

iTrader: (68)

Quite a bit, it goes from being deep and burbly on the standard manifold to raspier and less burbly on a stainless steel unequal length manifold

jaygsi

iTrader: (46)

Headers is an American team, its called exhaust manifold

What engine you running? If you have a non turbo it will give you the boxer rubble, if you have a turbo with equal length manifold then it reduces the burble. I'd go unequal everyday

fat-thomas

iTrader: (4)

as banny says it makes the noise change but still burbles on unequal

jaygsi

iTrader: (46)

You should have unequal as standard on the turbo

fat-thomas

iTrader: (4)

more to the point though unless over 400bhp it wont really have much effect and also require a map tweak

jaygsi

iTrader: (46)

Fitted a Japspeed manifold to mine, seemed to make a difference in pickup, but nothing amazing. I found the biggest difference was 3" bore system with sports cat. It burbles deeply now

fat-thomas

iTrader: (4)

probably made no difference as you fitted a cheap chinese **** one.

if you are going to get one it needs to be a rcm/gt spec one thats decent quality.

JGlanzaV

iTrader: (3)

Not really any better quality, all made in the same place out of the same **** materials.

Bigger price tag maybe! mine has ran japspeed rcm, gt spec etc and I wouldn't recommend any of them.

jaygsi

iTrader: (46)

So you have fitted a rcm or gt spec to yours?

MattyB1983

iTrader: (51)

Here we go again with your amazing titanium manifolds

how did you get on with those top quality forged wheels you were buying that are actually cheap non forged wheels made in China.....???

fat-thomas

iTrader: (4)

i know rcm and gt spec are the same ones hence the / far better than the crapspeed or toyo rubbish as they cheaper ones actually lose you power.

obviously better mated to a harvey venturi up pipe

banny sti

iTrader: (68)

Agree gt spec/lateral/rcm are a level above the japspeed and so on stuff, gain power and last a reasonable amount of time. Of course killer bee are in another league compared to these but then so is the price tag.

Much of muchness either splash out once or if you're happy spending a few hundred quid every few years then stick with the gt spec stuff

johned

At last someone who calls them exhaust manifolds,magic.

fat-thomas

iTrader: (4)

i have heard the gt spec ones can crack but mostly due to al use. i bought mine second hand so no biggy if they do crack i guess.

joe v3sti

iTrader: (8)

Advanced automotive sell the gt spec items and they are pretty well priced I think

b3nmw

That's where I bought mine from. Very gd quality

banny sti

iTrader: (68)

That will speed up the process but ultimately its the heat the fatigues the metal and they mostly crack round the collecter, so virtually impossible to repair them

joe v3sti

iTrader: (8)

Last year I went to collect a car from a guy who worked at RCM, a mate of mine had bought this classic from him, so I went down on the Sunday to his house. Did the deal and he asked if I wanted to have a look round the shop, so went for a butchers which was great because I just had free run of the place do was looking at all sorts. In the engine room I was looking at an Iconal set of WRC headers, to the tune of £6k!
The quality was absolutely of the hook! it mad my gt spec headers look like sometging that you get free with your kids cereal Chances are I will never see another set again.

jaygsi

iTrader: (46)

You normally find that people who know naff all about cars call them headers.

veerinder9

iTrader: (1)

I've had gt specs and williams motorsports. My gt specs cracked and Williams lasted and was sold on. Also williams are cheap but great. Cost me £150 with uppipe. They did the same job. Only diff was the welding wasnt the very best but I wouldn't say they were **** either. Looked exactly the same as gt specs too.

jaygsi

iTrader: (46)

well my Japspeed was fitted years ago and hasn't cracked and works well

fat-thomas

iTrader: (4)

you mean it works
what power gains did it give you? as i said not needed below 400 bhp either as standard header will be fine.

XDevil666

Unequal created a lot more lag on mine and I do mean quite a lot, unless your going to be running power over 400 stick to standard, trust me

jaygsi

iTrader: (46)

Well thats a start

Not had on a dyno so can't give figures but it did improve performance, turbo seems to spoil up earlier

But saying that i've heard people say not to bother with 3" bore systems unless running high bhp.

But fitted powerflow 3" system and ran loads better. Once have new intercooler fitted, will get remap should be running some good bhp

Steve Whitehorn

iTrader: (13)

For the money.
The best set up is GT Spec and a Harvey up pipe to match the turbo/general set up.
They are not cheap like many manifolds but represent good value for money because they work.

Yes if you have very deep pockets there are better solutions

Again bigger exhaust is not always better. It is about removing back pressure. And so really we come back down to looking at a car holistically and aiming to design it as a rounded package to do a job.

As FT mentioned above. 400hp is the loose cut of point from moving from ported OEM manifolds and 2.5inch systems to 3inch systems and GT spec manifolds

fat-thomas

iTrader: (4)

So you are running 3 inch system and tubular headers unmapped...oh dear

jaygsi

iTrader: (46)

Nope theres no there's none of that American rubbish on my car

Dubzy

iTrader: (4)

Ive just gone from stock headers to unequal length tubular headers and although it still burbles at low revs it now sounds nowhere near as nice or as mean as it did before, i will stick with them as im above 400bhp but if i was below this i would change back without hesitation.

jaygsi

iTrader: (46)

You need need to give the system time to bed in, with most new systems it takes a while before noise levels increase. I've changed my system loads of times. At first they start off very quite, but over a course of miles sound increases

And Dubzy why are you paying for a full membership and a forsale membership. The access all areas membership covers the forsale section as well so your paying twice for no reason