Just wondering if anyone has installed one, and noticed a gain.

I found these, but I don't think you can install the stock heat shield with these, click here

does anyone know of a header that you can use your stock shield.


Thanks

 

Why not get them coated?

 

Header(S) implies two. MY evo only needs one exhaust manifold. V8 conversion???

 

yeah....i thought exhaust manifold was the correct term.....header is N/A autos, no??

 

Nah, header is a correct term for a tubular manifold as opposed to cast..

A header is a great option to pick up some power. There are several things about a header you need to keep in mind.

1) you want stainless steel, they don't rust, however stainless (and any other material that is welded) can eventually crack at the welds after a few years of heat cycling, and especially if their heated and suddenly quenched. (Driving the car and then the header gets soaked with water suddenly cooling it is a good real world example.) Cracking doesnt happen often, but it can lead to exhaust leaks. Its a bit of a pain to fix though.

2) The key to a good manifold/header is to keep the heat inside the exhaust system, which means its almost manditory to have a header coated with a thermal coating (Both on the inside and outside!) Most headers are do not have a coating which means you would have it added. Its a WORTHY and NECESSARY evil, especially with a turbo car. That heat is wasted energy, you want to try to get as much of it through the turbo so you can use as much of that wasted energy to drive the turbo. additionally retaining the heat within the exhaust system will lower under hood temps. Less heat under the hood means less heat potentially transferred back into the engine (by heating the induction system)

Lata..

 

I remember talking to the guys at Swain Tech coatings about coating the inside of the tubes. They said that they usually DIDN'T because, depending on the length and shape of the piping, there was no way to guarantee the coating would be applied evenly. Plus you wonder what kind of effect on the turbine a chipping/peeling coating may cause.

 

Are you looking for a gain on the stock turbo? Because I remember David from Buschur saying you are not going to gain much on the stock turbo. Anybody else feel different on that?

 

RNR racing turbo kits come with a stainless header that looks nicer then that IMHO. There is not going to be much gain on the stock 16G, but its a good mod on a larger turbo.

peeling jet coating going through your turbo would never affect it.

 

 

Thanks for all the info.