454 exhaust manifolds
My 1999 gas Trek had both exhaust manifolds crack. The choice was to replace with new cast manifolds or headers. I researched Banks and was told they only had materials for 4 more 454 header sets then the product would be discontinued. Jegs & Summit still had Banks headers in their inventory, so I bought a set of the "Long Tube" headers. Cost was $1400 and installation was $1600. This included drilling out 4 broken studs, cutting & tapping the length on some remaining studs that wouldn't come out so they fit the header flange, 2 new Oxygen sensors, and cutting off a large unused frame bracket that interfered with the passenger side header. That's a big expense, but the mechanic spent 2 days on the job, and I'm glad I didn't try to install the headers myself.
A post on another forum says Banks claims that their headers alone give 28 HP and 36 Ft Lb torque. Hmmm. I just drove back from the shop, and my Butt Dyno didn't feel much difference, so I need to get on the road for a better experience. I did notice my Scangauge showed around 5 degrees less coolant temp.
George Schweikle Lexington, KY
2005 Safari Trek 28 RB2, FMCA 190830, Safari International chapter. 1999 Safari Trek 2830, 1995 Safari Trek 2630, 1983 Winnebago Chieftain, 1976 Midas Mini