I was of the understanding that wrapping standard cast manifolds was something that you shouldn't do, as they will split. Well on other motors was always told not to.I thought it was only S/steel stuff you wrapped, but I seen some standard ported ones for sale on here that have been wrapped.

I understand the benefits of heat managment etc.As I have a wrapped downpipe, going to be wrapping the uppipe as well. But after seeing them was thinking of wrapping my non ported standard ones.
Can anyone shed some light on that?

 

i have wrapped ported headers off harvey from here just search for harvey

 

How long did you run with them wrapped?? Ported headers would flow the gases quicker than standard plus wrapping them helps with gas flow so more heat generated there. I just dont want to waste on heat wrap to find that it will crack the headers. I am not bothered about the headers as i have to spare sets.

 

Only had them done 6 months ago but i did a search on here first and everyone said speak to harvey he was very helpful got his ported and wrapped headers and 3 port and then a map tweek got anothe 21ft/lbs torque

 

Mine have been wrapped for 4 years I would say. No problems at all.

 

Isn't there heat shields on the standard headers anyway. I would have thought its only worth doing stainless ones but I'm no expert.