Headers or Manifolds?
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Cargo Master
Joined: Nov 2011
Posts: 3,354
Likes: 48
From: Great American SouthWest
Headers or Manifolds?
So, on the yellow truck (79 F-350 460 C6), I just rebuilt the top end with a Performer manifold and a Holley 4160 600 cfm vacuum secondaries. I think the cam is stock.
Currently, I don't tow anything, but may tow my ski boat and will probably get a small house trailer for weekends at the lake.
The dual exhaust (factory?) meets at the muffler for a single exit. On my old 79 F250 460 C6, I had glasspacks and true duals behind headers. I've done a lot of reading about manifolds being better for low rpm's, and headers only being effective at higher rpm's. I've also read how only Hedman headers fit my truck. I don't want fenderwell exits.
So, the question remains - headers or manifolds?
ps - I'm in rural Arizona - so screw the smog stuff!
Currently, I don't tow anything, but may tow my ski boat and will probably get a small house trailer for weekends at the lake.
The dual exhaust (factory?) meets at the muffler for a single exit. On my old 79 F250 460 C6, I had glasspacks and true duals behind headers. I've done a lot of reading about manifolds being better for low rpm's, and headers only being effective at higher rpm's. I've also read how only Hedman headers fit my truck. I don't want fenderwell exits.
So, the question remains - headers or manifolds?
ps - I'm in rural Arizona - so screw the smog stuff!
Fleet Owner
Joined: Dec 2009
Posts: 20,678
Likes: 82
From: NorCal
Headers... they'll increase HP and torque across the board.. Stay mild with sizing on true duals - at least 2.25-inch but not more than 2.5-inch tubing to maintain low end torque.
I recommend Stage 8 locking fasteners.
I recommend Stage 8 locking fasteners.
Thread Starter
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Cargo Master
Joined: Nov 2011
Posts: 3,354
Likes: 48
From: Great American SouthWest
Thanks - I had not considered tube size. I do remember a lot of exhaust leaks - I solved that by RTVing two gaskets together on each side. And now that I think more about it - I went through an awful lot of starters...
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