My car is on jack stands for some work I'm doing this winter so I had some downtime and I'm getting my Rev Hard Manifold and my exhaust housing off my turbo Jet-Hot coated. I know it will keep underhood temps down(I think) and won't it help the efficiency of the turbo a bit as well?
Thanks for any additional information.
M

 

I believe that since it's keeping the heat IN that means you might benefit some from the exhaust gasses flowing faster...more heat energy in other words. Does that make sense?

 

It will make a difference, but not as much as with a normal steel header. Cast iron is used for the manifold because its more heat resistant.

 

Retains not resistant.
Plus it looks better than rusty

 

the manifold will look better and it will retain more heat. I wouldnt count on any horsepower from underhood temps dropping. it gets hot as hell regardless.

 

Not horsepower, but you'll get a faster spool up.