I understand alot of people elect to put headers on the supercharged 6G74, and I question whether this would give any real benefit vs just a high flow muffler & cat.

Just a recollection of a previous experience I had with exhaust mods:

I once had a 6G72 powered Triton ute and took it to the exhaust shop. They advised not fitting extractors, and that best gains were from a high flow Lukey exhaust. I took their advice and the difference in Power felt noticable - don't have dyno to substantiate.

Then, ignoring good advice, I went and had some Genies bolted up. They did a dyno run before and after extractors.

The gain due to the extractors?

A massive two kilowatts.

It seems the standard exhaust manifold on all 6G series engines does a pretty good job, and youn could save yourself a heap of money by just replacing the system from the cat back.

probably true in terms of pure power gains, however tuned length extractors (like Pacemakers) will give you different power and torque curves. this will lead to more power across the rev range, not just more peak power (which, as you've described, was only increased by 2 kw in your Triton).

cheers,
.wook

Don't forget that extractor design dictates their performance. But another thing to remember is that the Tritons cams where no doubt design to produce torque Low in the rev range, thus sacrificing peak Power and Torque figures.

On a Magna a decent set of extractor coupled to a good exhaust will see a bit more improvement, that being said the only time I would fit a set and hope for a decent gain is if I have fitted aftermarket cams or a supercharger as the efficiency of the engine would then be increased. This is where the standard exhaust manifold will become a restriction.

I would recommend upgrading your entire exhaust for a forced induction setup. Dont expect any power gains with a stand alone exhaust upgrade. Thickening your exhaust often kills low down torque due to not remapping fuel/ignition, which can reduce power in a low torque car like a magna.

extractors are one of those mods that support the bigger mods, if that makes sense, so i think they will keep giving more gains the more u do to ur engine,

personally i cheaped out and brought ralliart extractors, and got a custon down/y pipe made up and that made a huge difference to the car and howm it feels, it revved out much better but lost low end,

correct me if im wrong but extractors are much the same as cams when u buy after market? they take power from one part of ur rev range and put it in another ... sort of ..so i ges its a horses for courses situation

i fitted rpw extractors to one of my magnas and felt it was the biggest waste of money ever.. i wouldnt bother.. spend your money on something useful...

for everyone saying that it's a waste of time / money, don't forget that the OP has just installed a supercharger and his exhaust is now the most restrictive component.

a high flow exhaust complete with extractors will give you serious improvements with your supercharger.

cheers,
.wook

oh didnt no he had a supercharger.. probably cant hurt to get them then

DO NOT GET EXTRACTORS/EXHAUST

i too have a s/c'd awd magna and due to my xhaust system sprintex are unable to tune it correctly, thats why im going aftermarket tune...

although the exhaust system was fitted before the s/c and it ran sweet as pre s/c no noticable power increase but i did save 1L/100km approx lol

i think thats more of an issue with sprintex ecu as opposed to getting good gains from extractors ..

i think the s/c + supporting mods and aftermarket ecu is proven to be effective now after TZA's results and that with stock heads and cams i belive?

i think thats more of an issue with sprintex ecu as opposed to getting good gains from extractors ..

i think the s/c + supporting mods and aftermarket ecu is proven to be effective now after TZA's results and that with stock heads and cams i belive?

I'm pretty sure TZABOY hasn't got an aftermarket ECU installed yet.

I'm pretty sure TZABOY hasn't got an aftermarket ECU installed yet.

tza hasnt got aftermarket ecu YET but does have extractors

ok well piggy back then

ok well piggy back then
if he had one before, I think you'll find he took it off...

as far as I know, Jase was going to wait a couple of months before putting on a Haltech and water/meth injection. his power figure was from a stock(ish) ralliart with the sprintex piggy back and tune.

cheers,
.wook

if he had one before, I think you'll find he took it off...

as far as I know, Jase was going to wait a couple of months before putting on a Haltech and water/meth injection. his power figure was from a stock(ish) ralliart with the sprintex piggy back and tune.

cheers,
.wook

spot on

unichip he had was removed before charger was fitted

The OP has an AWD? I found that after I put extractors on mine I got a fair bit more low down torque. The Y/collector pipe in the AWD is even more restrictive than the FWD due to less room. I would go for it but maybe only if you were going to do more mods that would also void the sprintex warranty i.e. chip/water injection etc.

The OP has an AWD? I found that after I put extractors on mine I got a fair bit more low down torque. The Y/collector pipe in the AWD is even more restrictive than the FWD due to less room. I would go for it but maybe only if you were going to do more mods that would also void the sprintex warranty i.e. chip/water injection etc.

sprintex is all good warranty wise and helpful in regards to tune on my car with the exhaust set up,

but just a point to note that sprintex's own car does not have extractors, it's just std headers highflow cat and std tail pipe then dual system at the rear (for show purposes im informed by sprintex)

if anything get the extractors if you can spare the $$$ but cat would be higher on the list (METAL cat)

rember the under bonnet temps too, it get insanely hot under there with the s/c, ectractors help a little with the heat as they have less mass than the cast manifold and cool quicker... i'd get mine hpc coated if i could be stuffed.... but i cant lol....

i got the stainless HM headders, as they have the ground clearance, are direct bolton no mods unlike others i researched and have a 10yr warranty (important as ppl tell me stainless crack) but stainless can contain the heat better than mild steel... and the main thing is i got them supply and fitted cheeeep lol.... although the rpw long primary's look the goods, but im happy with what i got, even the factory heat shields go back on and when you pop the hood all looks normal

So u guys say if i want to put Pacemakers on my TJ i wouldnt get more power? I got catback,K&N Panel filter with CAI.

So u guys say if i want to put Pacemakers on my TJ i wouldnt get more power? I got catback,K&N Panel filter with CAI.


barely noticable but yeah a little. I would not do it again until I had done engine work first...not worth the money. probably a bit more burble sound when backing off. revs a bit more freely higher in the rev range as has been covered before.

So u guys say if i want to put Pacemakers on my TJ i wouldnt get more power? I got catback,K&N Panel filter with CAI.

Those that say extractors do ****, why then did mitsu waste time and money designing
one for the Ralliart Magna. Tuned length extractors give all-round performance boost and
most notably, improves low down torque. If you want peak power improvement, use race
tune extractors (short and thick primaries)

Those that say extractors do ****, why then did mitsu waste time and money designing
one for the Ralliart Magna. Tuned length extractors give all-round performance boost and
most notably, improves low down torque. If you want peak power improvement, use race
tune extractors (short and thick primaries)

the original post was for extractors V's catback system with the later i would say give more gains based on my experience. The extractors alone would hardly be worth the $550-700 people are paying for the gain achieved. And as for the ralliart magna, it has other engine mods to support its use of extractors.

i put extractors on my last TH 3.5L and i don't think they made much difference. up the top of the rev range was a touch crisper, but not really noticable. cat back exhaust made a difference though.

on one of my other cars, a SSS pulsar (natro sr20) extractors made a HUGE difference. with the stock headers the car would start to choke when it got to about 5500rpm. with the genies on it it now revs up to 550 easily, then comes alive and pulls even harder to the 7500rpm redline.