What size header for this combo
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Senior User
Joined: Mar 2006
Posts: 212
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From: Morganton, NC
What size header for this combo
I currently have this combo in my truck with factory manifolds:
Edelbrock 600
Edelbrock Performer 400 intake
.485/.510 218/228 112LSA cam
0 decked block
unknown factory heads and unknown CID
The only set of headers I could find for my truck (86 F150 4X4 with a 351M/400 swapped in with a linkage clutch system also swapped) have 1.5" primaries and a 2.5" collector. This seems a little small to me. I was looking for something around 1.625/3".
I don't tow anything at all.
Edelbrock 600
Edelbrock Performer 400 intake
.485/.510 218/228 112LSA cam
0 decked block
unknown factory heads and unknown CID
The only set of headers I could find for my truck (86 F150 4X4 with a 351M/400 swapped in with a linkage clutch system also swapped) have 1.5" primaries and a 2.5" collector. This seems a little small to me. I was looking for something around 1.625/3".
I don't tow anything at all.
Posting Guru
Joined: Jan 2005
Posts: 1,299
Likes: 2
From: The Vieux Ford, Kansas
Those almost sound like 351W headers I think you need 1 5/8 to cover the exhaust port on a 351M/400. Not positive on that but I don't think you engine will out flow the headers listed either, most people don't need three inch collectors and the primary size is only 1/8 smaller than what is normally used on these engines. You would need a pretty hot motor to want to run 3" exhaust and you don't need 3" collectors unless you want 3" pipe. What set of headers are you looking at?
-Johnboy
-Johnboy
Elder User
Joined: May 2002
Posts: 526
Likes: 0
From: Sin City, USA
I currently have this combo in my truck with factory manifolds:
Edelbrock 600
Edelbrock Performer 400 intake
.485/.510 218/228 112LSA cam
0 decked block
unknown factory heads and unknown CID
The only set of headers I could find for my truck (86 F150 4X4 with a 351M/400 swapped in with a linkage clutch system also swapped) have 1.5" primaries and a 2.5" collector. This seems a little small to me. I was looking for something around 1.625/3".
I don't tow anything at all.
Edelbrock 600
Edelbrock Performer 400 intake
.485/.510 218/228 112LSA cam
0 decked block
unknown factory heads and unknown CID
The only set of headers I could find for my truck (86 F150 4X4 with a 351M/400 swapped in with a linkage clutch system also swapped) have 1.5" primaries and a 2.5" collector. This seems a little small to me. I was looking for something around 1.625/3".
I don't tow anything at all.
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