Hi guys, this is the first I've seen of extractors for a 4 cyl magna.

http://www.ebay.com.au/itm/150765217899?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649#ht_1026wt_1037

Now i know stock extractors are cast iron... gee i hope so i dont wanna look like an idiot... but these are just mild steel. are they still ok to use?

If memory serves correctly the standard exhaust manifold on a 4cyl te/tf is in fact mild steel, so you would be replacing it with the same material. Most extractors are only available in mild steel, and are perfectly fine to use on a car that had a cast iron exhaust manifold fitted originally.

These may give you a bit of extra power, but at that price it seems completely not worth it considering how cheaply you can buy a 3.0 or 3.5L Magna.
You'd probably be way better off selling your car and upgrading to one with a bigger engine

In short you would be replacing what you have with pretty much the same thing, waste of money IMO, if this is the car I think it is, may even be worth in the long run to investigate putting a 6G74 into this car.

Agreed. Don't flog a dead horse. Buy a more powerful car or put in a better engine if you want performance increases

I fitted Pacemaker extractors to my 1985 TM (manual) in 1988, and they definitely improved mid-range torque & throttle response.

Cost about $250 including fitting (but it was way back in 1988!)

But that was an old carby Astron 2.6 with "log style" cast iron exhaust manifolds. I guess you have a TE or TF 2.4 litre, in which case I doubt the advertised extractors would be much improvement. And not worth the asking price.

KJ.

stock manifold is steel. It is a 4-2-1 " ïnterference" design which is well suited to the 2.4L motor and pretty good for a factory manifold. The flange is where it merges to 2 pipes.
These hurricane extractors will not improve power much and will move the torque band higher in the rev range.
Not worth the money unless you want them for looks.
Regards
Epitrochoid