Headers make a difference?, Headers? "High Flow" cats? some one help! 94 ST Options

[mgnt232]

I Have a 1994 Toyota Celica ST 1.8L 7A-FE
I recently had a Magnaflow "catback" installed.

I was looking into getting headers when i came across something interesting.
I saw that in order for the headers to give you car the extra power, you need to have a high flow catalytic converter. I am not sure if this is true, but i believe it is because the extra flow, from the headers would be slowed by the restrictive stock cat? am i correct? (the cat back is not restricted any more, with my new magnaflow exhaust system)
And if this is correct, would these two things match up?

The cat i am looking at ( http://www.planetmagnaflow.com/mfcatsearch...catmodel=CELICA ) !*The first direct fit one*!

The headers i am looking at ( http://cgi.ebay.com/ebaymotors/ws/eBayISAP...alenotsupported )

Are headers worth it? do i need the new cat? would it be better? with the new cat, is it worth it at all? ive never seen the difference, but im assuming alot of you have, so any one with any info, please give me some answers. thanks!-

[match220]

actually, in the best motorcycle aftermarket systems, the full exhaust system is titanium, specifically for the reason that I'm mentioning, people trying to pull every little bit of power out of it as they can. And I'm more of a motorcycle guy, so I've seen more aftermarket bike headers than car ones, sorry for that assumption carrying over into aftermarket car headers

I won't disagree with you that most systems are stainless, anyone can see that, this is probably because stainless is cheaper to manufacture than the other systems and it's also more viable for the buyer since that makes it about $500 cheaper, and most buyers don't know the thermodynamics behind an exhaust system anyway, they just buy what looks better. With the drag headers, I can understand them being stainless instead of something else because the full exhaust system on a dragster is 3 feet long (ish), so the exhaust doesn't have long enough to cool down. However on a car, you have 10 - 12 feet of exhaust, and if that is all stainless you WILL release heat, and lose performance in a street car setup. I don't care what most people sell, this is science, and in the end, science prevails (except with evolution )