I wasn't talking about auto cross. Auto cross has stupid rules and very little track time :lol:.

ITS is a road racing class

For the money, Racing Beat RoadRace full exhaust.
It is a heavy unit tho, you can get some custom made with Titanium and with every custom build exhaust I recommend flex pipe built into the system esp for turbo's to avoid problems later like cracked hot side of turbo and helps the exhaust from getting leaks at the gaskets.

ISC makes a header that the ITS guys swear by.

There are many more NA Road track cars than there are turbo's, for the simple fact that the RX-7's are classed very competitively in those classes then only allow limited modifications.

A collected header is best for a rotary engine.

I was planning on using the ISC headers when i go peripheral port, ii'm glad people hear good things about them.

As far as something for a stock port engine goes that doesn't cost 500 or more, is there many choices? I am half tempted to just make my own. I have a welder, might as well use it.

The streetable Racing Beat header isn't that bad. I was making 155-160whp with a stock ~180k mile S4. You're going to find the best options from a racing team who sells their headers, but you're going to pay for their R&D. Or you could get the Racing Beat road race header and make a collector shortly after the flange, but expect to make a few before you get it "right".

looked a little, the ISC is only 350 and is stainless which is on par with Racing beat.

From the pictures and what people have said, the ISC header is a better design as it hruns several inches from the port before the first bend. You could save ~$100 and get the non-stainless road race header from Racing Beat but it will not last as long.

I ended up going with the ISC stainless header rather than trying to save a few bucks.

Whats your thoughts on it

Not sure yet, it's in the mail. I lost my motor so I'll have to take care of that before I'll know for sure.

There's a guy on the other forum called pirsq. He says he's got a new exhaust system, similar to the ISC, with some promising results, though none verified.

i've read his stuff a number of times, but seems to be a lot of hear say floating around. Ill look into it if he ever puts a chart or even a price.

He won't, he wants you to call him.

Do you have the link to the ISC header? I tried google searching it but got nothing. (Or I am blind...)

N/M
Found it.
http://iscracing.net/2nd_Gen_Parts.htm