RustyBanger
+1y
Well, never would of thought that wrapping the headers off the head with a 25 ft x 2" roll of 1000 c heat resistant tape, split between each header, would make such a difference, but the necessary heat insulation, ( my a/c hose was going to melt - I'm sure of it + some of the wiring had it's conduit melted from the under hood inferno the headers created,) has has a win / win secondary effect of showing the real potential the headers have. Really quite noticeable improved acceleration. The lower underhood temps improve the intake, additionally the higher exhaust temps making for better scavenging of the exhaust gases. This has made all the effort worthwhile. So get the 2" wide tape if you want, cost me $50 Aus. I wired up the top of each run with part of a steel coat hanger then wound it round the header about 2 1/2ft down each one, but I think you have to consider this as an essential part of the header process - at least in my 98 Courier's engine bay!