Exhaust systems
My profile is up to date on my unit. After 18 years and 85k miles, my exhaust manifold has held together ok(bite my tongue). I know it is a matter of time until the dreaded 460 v8 manifold virus str...
Forum Discussion
I put the Doug Thorley headers on 1984 P30 454 years ago. They worked great and were only 1/2 the cost of the Banks system. I needed a manifold because a plug wire went bad which allowed an unburned fuel mixture to enter the manifold where it ignited and overheated the old cast iron manifold and cracked it. I could have paid GM big bucks for another cast iron manifold and been no better off than I had been or pay a little more and replace both of the cast iron manifolds, and all the exhaust piping. I went with the headers and exhaust pipes. It really helped between 45-60 when I was passing but there was no real difference in mpg.
