hey

I've been talking about this on another forum, and there seems to be mixed opinion as to the merit of heat wrapping exhaust extractors, one train of thought goes that this will contain heat in the exhaust pipe, which promotes greater gas speed and better scavenging, and also this reduces under bonnet temperatures, the other train of thought goes that this will cause the extractors to crack from overheating, and they will also corrode away faster, thus negating the benefits especially on a road-going car.

 

Who here has exhaust wrapping, what are your headers made out of, and how long have you had them set up that way?

 

I was thinking of buying a set of reasonable quality mild steel headers, and heat wrapping them (not for the corolla, for the dyna). Not quite sure about whether its worth going ceramic coated (bang for buck) but I'm thinking wrapping sounds good at this stage. I'm looking at reducing under-seat temperatures as much as possible.

 

Robert.

I had it on my daily celica for two years and never encountered any issues. I'm yet to have anyone actually show me photos/whatever of damage caused by heat wrap alone. Nice cheap little mod, made for noticeable power gains once you got the extractors hot.

I had a set that went brittle after a while. You could tell by the way they cracked. I prefer HPC or a proper heat shield. The ACL stuff they use on Ford Turbos is excellent.