Header flange thickness - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Spassmacher · 09-27-2011, 10:28 AM

It has been suggested to me that I try to find headers with 1/2 inch flanges. I've looked everywhere and they don't seem to be very prevalent. I'm looking to heat wrap a natural finish set of headers, and don't want to weld them up myself, I'm a little green for that level of build. I was hoping that i could keep the cost under $500 I'm not sure if 3/8 is the new standard and I have outdated information, or if I'm just looking in the wrong places. Thanks guys!
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gcburdic · 09-27-2011, 12:36 PM

pending on what engine you are running, I think member Hart_Rod has a custom made set that are very nice....check the parts section...

TobyArnot · 09-27-2011, 01:18 PM

Truthfully, I don't think I've ever seen any commercially made headers with 1/2" flanges. About the thickest flange out there are 3/8". Sanderson has 3/8" flanges. Some others do also.
.
Another suggestion, if you want heavy flanges, you might consider these:
.
http://www.speedwaymotors.com/Tru-Ra...olds,3823.html

Lee H · 09-27-2011, 04:23 PM

I to have never seen commercially available headers with 1/2 inch flanges. As far as header wrap, think you should research that a little. They will be dust in about a year. Most header manufacturers void the warranty of wrapped headers.
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**specialtyretail** · 09-27-2011, 05:39 PM

5/16 is common, 3/8 premium. Have never seen (not saying they don't make) any commercially available headers with 1/2 inch flanges.

bbadfred · 09-27-2011, 05:42 PM

I have never heard of a 1/2" flange. 3/8" will be fine, Thorleys have a 3/8 flange and build a nice header.

webfoot · 09-27-2011, 05:52 PM

Quote:

Originally Posted by TobyArnot

Truthfully, I don't think I've ever seen any commercially made headers with 1/2" flanges. About the thickest flange out there are 3/8". Sanderson has 3/8" flanges. Some others do also.
.
Another suggestion, if you want heavy flanges, you might consider these:
.
http://www.speedwaymotors.com/Tru-Ra...olds,3823.html

Those are cool!

Spassmacher · 09-28-2011, 02:08 PM

Thanks, this helps a lot. I think it should be easy to find some nice 3/8" flange headers for less than an arm and a leg.
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09-27-2011, 10:28 AM	#1
Spassmacher Registered User Join Date: May 2011 Location: Portland, Oregon Posts: 26	Header flange thickness It has been suggested to me that I try to find headers with 1/2 inch flanges. I've looked everywhere and they don't seem to be very prevalent. I'm looking to heat wrap a natural finish set of headers, and don't want to weld them up myself, I'm a little green for that level of build. I was hoping that i could keep the cost under $500 I'm not sure if 3/8 is the new standard and I have outdated information, or if I'm just looking in the wrong places. Thanks guys! Posted via Mobile Device

09-27-2011, 12:36 PM	#2
gcburdic Restoration Virgin! Join Date: Jan 2008 Location: Huntersville, NC Posts: 8,298	Re: Header flange thickness pending on what engine you are running, I think member Hart_Rod has a custom made set that are very nice....check the parts section... __________________ Geoff with a G 1968 Chevy C10 SWB The Mistress 1972 Custom Deluxe C20 Suburban A Suburban Named Isabella 1966 Ford Mustang Mama's High School Graduation Present

09-27-2011, 01:18 PM	#3
TobyArnot Quit if it's not FUN!!! Join Date: Jul 2010 Location: Indian Trail, N.C, Posts: 864	Re: Header flange thickness Truthfully, I don't think I've ever seen any commercially made headers with 1/2" flanges. About the thickest flange out there are 3/8". Sanderson has 3/8" flanges. Some others do also. . Another suggestion, if you want heavy flanges, you might consider these: . http://www.speedwaymotors.com/Tru-Ra...olds,3823.html

09-27-2011, 04:23 PM	#4
Lee H Registered User Join Date: Jun 2010 Location: Upland Ca Posts: 4,143	Re: Header flange thickness I to have never seen commercially available headers with 1/2 inch flanges. As far as header wrap, think you should research that a little. They will be dust in about a year. Most header manufacturers void the warranty of wrapped headers. Posted via Mobile Device __________________ 1972 C10 SWB, Air, PS, PB, 350/350THM. Second owner. 1965 Corvette roadster, 44K miles, 327/365 SHP, 4 speed, side exhaust, knockoffs, teak, second owner (bought in 1970), Have ALL numbers matching components. My frame off restoration thread: http://67-72chevytrucks.com/vboard/s...d.php?t=556703

09-27-2011, 05:39 PM	#5
specialtyretail So,, what else you got??? Join Date: May 2010 Location: Jackson, Mo Posts: 18,637	Re: Header flange thickness 5/16 is common, 3/8 premium. Have never seen (not saying they don't make) any commercially available headers with 1/2 inch flanges.

09-27-2011, 05:42 PM	#6
bbadfred bbadfred Join Date: Mar 2008 Location: rantoul Il Posts: 461	Re: Header flange thickness I have never heard of a 1/2" flange. 3/8" will be fine, Thorleys have a 3/8 flange and build a nice header.

09-28-2011, 02:08 PM	#8
Spassmacher Registered User Join Date: May 2011 Location: Portland, Oregon Posts: 26	Re: Header flange thickness Thanks, this helps a lot. I think it should be easy to find some nice 3/8" flange headers for less than an arm and a leg. Posted via Mobile Device



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