tpierce

but it will help keep the heat in the exhaust and out of the engine bay.

|skolnick

Why would you make such a fragile header in the first place?

UrS4boy

normal cast iron or even Inconel. Exception would be extrude honing of the cast, etc.

cpayne

Cast..but did have my 034 RS2 replica coated by 034 in Cali too

cpayne

Heat Scavaging, Underhood temps, & Longevity

tpierce

flow? it goes on the outside...

Stock_Quattro

LMAO

urS4guy

If you ever have to go back and do some repair on the manifold, any coating will complicate things to no end. I wouldn't do it and I'm not going to do it on mine. My old mild steel one was another story and I coated that one. Besides, I kind of like the look of welded stainless steel.

<img src="http://pictureposter.audiworld.com/15038/eng-5.jpg">

Hap, wit dakine coating stuff not from Evahboost, Maguire

Only-Emre

It usually goes on the inside and the outside, sometimes on the inside only.

Only-Emre

But a free flowing cast manifold is the best of both worlds.