How to measure headers
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Lead Driver
Joined: Aug 2003
Posts: 6,305
Likes: 18
From: Boulder Creek, Ca
How to measure headers
I want to replace existing headers on my 65 F100 with same so I can keep the existing, relatively new, exhaust system. There are a couple choices for the Hooker Competition Long Tube, but I can not find where the supplier provides instructions on header nomenclature and/or how to measure for a replacement; i.e., flange size, primary tube length, collectors dia., I assume the collector is the section where the tubes meet, etc. Appreciate suggestions, website, comments.
Logistics Pro
Joined: Feb 2000
Posts: 3,955
Likes: 50
From: Mesa
Summitracing has the specs listed for their headers. If you know the Hooker part # then search for that on there. I looked real quick and found a set for a 1970 (Ford didn't put the 302 in a 65) Now whether I not they will line up with the exhaust you have now who knows. These specs don't tell us that.
Example:
Header Style:Full-length
Header Material:Steel
Header Finish:Painted
Weld-Up:No
Primary Tube Diameter (in):1 5/8 in.
Collector Attachment:3-bolt flange
Collector Diameter:2.500 in.
Tuned:No
Primary Tube Length (in):27 in.
Primary Tube Gauge:16-gauge
Flange Style:Standard
Flange Thickness (in):5/16 in.
Bolts/Studs Included:Yes
Gaskets Included:Yes
Reducers Included:No
Crossover Pipe Included:No
Catalytic Converter(s) Included:No
Motor Mounts Included:No
Transmission Mount Included:No
Example:
Header Style:Full-length
Header Material:Steel
Header Finish:Painted
Weld-Up:No
Primary Tube Diameter (in):1 5/8 in.
Collector Attachment:3-bolt flange
Collector Diameter:2.500 in.
Tuned:No
Primary Tube Length (in):27 in.
Primary Tube Gauge:16-gauge
Flange Style:Standard
Flange Thickness (in):5/16 in.
Bolts/Studs Included:Yes
Gaskets Included:Yes
Reducers Included:No
Crossover Pipe Included:No
Catalytic Converter(s) Included:No
Motor Mounts Included:No
Transmission Mount Included:No
Thread Starter
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Lead Driver
Joined: Aug 2003
Posts: 6,305
Likes: 18
From: Boulder Creek, Ca
Can't thank you enough for the info., found it very helpful. Went online to a couple header manufacturer's, Sanderson for one, who use to provide a diagram and instructions on their website on how to measure vehicle for headers but I could not find it.
Initially hoping to get the truck back on the road within a short period of time by ordering the headers online in advance. Believe I came across the same Hooker header's U mentioned thru either Summit, or Jeg's and based on their description the headers should fit; however, as noted, whether the header flanges to port fit is the same is the question so now I am considering calling a couple of local auto parts supplier's, who over the years, have been able to obtain parts for my 65 within 24 hours, and take the old headers for measurement and comparison then place the order thru them which should eliminate any concerns I have about fitment. Again, thank you for taking the time to post the information!!.
Initially hoping to get the truck back on the road within a short period of time by ordering the headers online in advance. Believe I came across the same Hooker header's U mentioned thru either Summit, or Jeg's and based on their description the headers should fit; however, as noted, whether the header flanges to port fit is the same is the question so now I am considering calling a couple of local auto parts supplier's, who over the years, have been able to obtain parts for my 65 within 24 hours, and take the old headers for measurement and comparison then place the order thru them which should eliminate any concerns I have about fitment. Again, thank you for taking the time to post the information!!.
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