Summit Headers - The 1947 - Present Chevrolet & GMC Truck Message Board Network

03BlkZ · 02-19-2021, 01:59 PM

Has anyone used the summit headers SUM-G9006-SS stainless steel headers on their C10 builds. I am not looking for a coated or painted header and this one seems to be one of the few out there. I also have a 70 C10 3 on the tree and I have heard these work well on a manual truck. I was wondering if anyone had used them and wanted to know fit and finish. The have some of the thickest flanges I have seen. Any help would be great especially for a 3OTT guy like me. Thanks
https://www.summitracing.com/parts/s...ckup/year/1970

**pjmoreland** · 02-19-2021, 02:26 PM

I'm planning on using these headers. The price is the lowest I've seen for stainless headers. There's a good review with photos right there in the link you posted from someone who installed them on a 70 C10 without any real issues.

**pjmoreland** · 02-19-2021, 02:37 PM

Oops. That review is for a 79, not a 70

**pjmoreland** · 02-19-2021, 02:38 PM

There's a 67 C10 review where the motor mount had to be notched. That doesn't sound too good.

03BlkZ · 02-19-2021, 02:59 PM

I may just attempt it because they are one of the only sets I can find that says fit 3 OTT.
All others are coated or painted and have thin flanges. I am used to multiple companies with quality stainless headers that fit for corvettes. I have owned a C5 and a C6 Z06 and never has any issues with companies like American racing.or kooks but they don't really offer anything for these trucks. Kooks does but requires modifications. If I would have LSswapped it would not have been much of an issue.

**pjmoreland** · 02-19-2021, 04:20 PM

I'll be interested to see how they work out for you.

72LB · 02-19-2021, 05:26 PM

I have a set on my 69. Decent header just wish they didn't sit as low as they do.

drewbert41 · 02-19-2021, 05:32 PM

Quote:

Originally Posted by 72LB

I have a set on my 69. Decent header just wish they didn't sit as low as they do.

Same here, way below the frame.

tim_mc · 02-19-2021, 05:39 PM

Agreed...the Summit SS headers worked well for me, but they do hang a bit lower than I'd like.

**pjmoreland** · 02-19-2021, 08:17 PM

Quote:

Originally Posted by tim_mc

Agreed...the Summit SS headers worked well for me, but they do hang a bit lower than I'd like.

Did you have any interference problems between the headers and engine mount brackets or frame rails?

03BlkZ · 02-19-2021, 09:02 PM

I bought them so I will see the fitment with 3 OTT

tim_mc · 02-19-2021, 10:45 PM

Quote:

Originally Posted by pjmoreland

Did you have any interference problems between the headers and engine mount brackets or frame rails?

No sir, no interference between the headers and brackets or frame, however I have my 350 in the I6/4x4 SBC position further back towards the firewall.

rockyrivermark · 02-20-2021, 01:22 AM

I’m guessing you already know this but if not stainless headers discolor from the heat.

03BlkZ · 02-20-2021, 08:38 AM

Quote:

Originally Posted by rockyrivermark

I’m guessing you already know this but if not stainless headers discolor from the heat.

Yes. I had kooks stainless headers on my Z06 and I likes how the discolored.

tim_mc · 02-20-2021, 11:32 AM

I did some research on these headers before I got them. I wanted a set of 304SS headers that would last, and I don't mind the bluing/discoloration. I also like Summit's no-hassle return policy if there's a problem. I believe they are made by Flowtech for Summit. If you look at Summit P/N 11500FLT, they have the same bends and design as SUM-G9006-SS, but the stainless headers appear to have a thicker flange.

A few years ago there were complaints that the mounting holes weren't correctly aligned, but that has since been fixed. Mine bolted up to both my old GM iron heads and my new Brodix aluminum heads without a problem. I saw a review that one '67 C10 owner needed to notch the right side motor mount bracket to clear one header tube.

72LB · 02-21-2021, 07:40 AM

Quote:

Originally Posted by pjmoreland

Did you have any interference problems between the headers and engine mount brackets or frame rails?

No they fit just fine that way.

Peanut74 · 02-22-2021, 10:08 AM

I have these headers on my '67 with a 350. As I stated in my review I did notch the passenger side mount about 1/4" to give more clearance to one header tube. I did it more to make sure it didn't rattle against it when the motor was under load. The other ting I did was swap out the bolts that came with it. While they did work they only went into the head about 3/16's to 1/4". I wasn't comfortable with that so I bought some longer ones to use. As far as hole alignment and ease of install they were great. Put the header bolts in finger tight until all where in then torqued them down. No major issues.

As far as how low they hang mine hang 4"-5" below the frame. Since I don't plan on lowering it the weeds they will work fine. Overall I am happy with them and would get them again.

Nagintime · 02-26-2021, 02:49 PM

here what i went with: Hedman hedders 66092 paired with the Thrush 89027 exhaust set up. https://www.youtube.com/watch?v=oOtVRs7c_Fg

seeing is believing.

03BlkZ · 02-26-2021, 10:46 PM

Quote:

Originally Posted by Nagintime

here what i went with: Hedman hedders 66092 paired with the Thrush 89027 exhaust set up. https://www.youtube.com/watch?v=oOtVRs7c_Fg

seeing is believing.

Is your C20 a column or floor shift? My C10 is column.

Nagintime · 02-27-2021, 12:13 AM

Floors shift

03BlkZ · 02-27-2021, 11:31 AM

Crap! Summit said ship date 3/3/21 originally now showing 5/25/21. This is so frustrating! May have to find another option.

02-19-2021, 01:59 PM	#1
03BlkZ Registered User Join Date: Nov 2015 Location: Hewitt, Tx Posts: 386	Summit Headers Has anyone used the summit headers SUM-G9006-SS stainless steel headers on their C10 builds. I am not looking for a coated or painted header and this one seems to be one of the few out there. I also have a 70 C10 3 on the tree and I have heard these work well on a manual truck. I was wondering if anyone had used them and wanted to know fit and finish. The have some of the thickest flanges I have seen. Any help would be great especially for a 3OTT guy like me. Thanks https://www.summitracing.com/parts/s...ckup/year/1970

02-19-2021, 02:26 PM	#2
pjmoreland Senior Member Join Date: Jan 2005 Location: CA Posts: 5,770	Re: Summit Headers I'm planning on using these headers. The price is the lowest I've seen for stainless headers. There's a good review with photos right there in the link you posted from someone who installed them on a 70 C10 without any real issues.

02-19-2021, 02:37 PM	#3
pjmoreland Senior Member Join Date: Jan 2005 Location: CA Posts: 5,770	Re: Summit Headers Oops. That review is for a 79, not a 70

02-19-2021, 02:38 PM	#4
pjmoreland Senior Member Join Date: Jan 2005 Location: CA Posts: 5,770	Re: Summit Headers There's a 67 C10 review where the motor mount had to be notched. That doesn't sound too good.

02-19-2021, 02:59 PM	#5
03BlkZ Registered User Join Date: Nov 2015 Location: Hewitt, Tx Posts: 386	Re: Summit Headers I may just attempt it because they are one of the only sets I can find that says fit 3 OTT. All others are coated or painted and have thin flanges. I am used to multiple companies with quality stainless headers that fit for corvettes. I have owned a C5 and a C6 Z06 and never has any issues with companies like American racing.or kooks but they don't really offer anything for these trucks. Kooks does but requires modifications. If I would have LSswapped it would not have been much of an issue.

02-19-2021, 04:20 PM	#6
pjmoreland Senior Member Join Date: Jan 2005 Location: CA Posts: 5,770	Re: Summit Headers I'll be interested to see how they work out for you.

02-19-2021, 05:26 PM	#7
72LB Registered User Join Date: May 2017 Location: Inman/Boiling Springs, SC Posts: 420	Re: Summit Headers I have a set on my 69. Decent header just wish they didn't sit as low as they do. __________________ 1985 C10 shortbed, current project. Member of the Upstate SC GM Truck Club.

02-19-2021, 05:39 PM	#9
tim_mc Registered User Join Date: Jan 2019 Location: St Peters, MO Posts: 440	Re: Summit Headers Agreed...the Summit SS headers worked well for me, but they do hang a bit lower than I'd like. Attached Images __________________ 1967 C20, 350 SBC w/Comp roller cam, 700R4 w/3.42 posi, PS, 4-wheel PDB, Old Air AC & GM Tilt column.

02-19-2021, 09:02 PM	#11
03BlkZ Registered User Join Date: Nov 2015 Location: Hewitt, Tx Posts: 386	Re: Summit Headers I bought them so I will see the fitment with 3 OTT

02-20-2021, 01:22 AM	#13
rockyrivermark Registered User Join Date: Apr 2011 Location: Fairview Park, Ohio Posts: 1,031	Re: Summit Headers I’m guessing you already know this but if not stainless headers discolor from the heat. __________________ My build page http://67-72chevytrucks.com/vboard/s...d.php?t=764662 My cabinet building site http://www.cbcabinets.com

02-20-2021, 11:32 AM	#15
tim_mc Registered User Join Date: Jan 2019 Location: St Peters, MO Posts: 440	Re: Summit Headers I did some research on these headers before I got them. I wanted a set of 304SS headers that would last, and I don't mind the bluing/discoloration. I also like Summit's no-hassle return policy if there's a problem. I believe they are made by Flowtech for Summit. If you look at Summit P/N 11500FLT, they have the same bends and design as SUM-G9006-SS, but the stainless headers appear to have a thicker flange. A few years ago there were complaints that the mounting holes weren't correctly aligned, but that has since been fixed. Mine bolted up to both my old GM iron heads and my new Brodix aluminum heads without a problem. I saw a review that one '67 C10 owner needed to notch the right side motor mount bracket to clear one header tube. __________________ 1967 C20, 350 SBC w/Comp roller cam, 700R4 w/3.42 posi, PS, 4-wheel PDB, Old Air AC & GM Tilt column. Last edited by tim_mc; 02-20-2021 at 11:47 AM.

02-22-2021, 10:08 AM	#17
Peanut74 Registered User Join Date: May 2018 Location: Prattville, AL Posts: 611	Re: Summit Headers I have these headers on my '67 with a 350. As I stated in my review I did notch the passenger side mount about 1/4" to give more clearance to one header tube. I did it more to make sure it didn't rattle against it when the motor was under load. The other ting I did was swap out the bolts that came with it. While they did work they only went into the head about 3/16's to 1/4". I wasn't comfortable with that so I bought some longer ones to use. As far as hole alignment and ease of install they were great. Put the header bolts in finger tight until all where in then torqued them down. No major issues. As far as how low they hang mine hang 4"-5" below the frame. Since I don't plan on lowering it the weeds they will work fine. Overall I am happy with them and would get them again. __________________ -------------------------------------------------------- 1967 C10 "Snowball" (Currently in a thousand pieces down from a bazillion) 1989 Toyota DLX pickup "The Hulk" Last edited by Peanut74; 02-22-2021 at 10:11 AM. Reason: add information

02-26-2021, 02:49 PM	#18
Nagintime Registered User Join Date: Apr 2019 Location: Hemlock NY Posts: 5	Re: Summit Headers here what i went with: Hedman hedders 66092 paired with the Thrush 89027 exhaust set up. https://www.youtube.com/watch?v=oOtVRs7c_Fg seeing is believing.

02-27-2021, 12:13 AM	#20
Nagintime Registered User Join Date: Apr 2019 Location: Hemlock NY Posts: 5	Re: Summit Headers Floors shift

02-27-2021, 11:31 AM	#21
03BlkZ Registered User Join Date: Nov 2015 Location: Hewitt, Tx Posts: 386	Re: Summit Headers Crap! Summit said ship date 3/3/21 originally now showing 5/25/21. This is so frustrating! May have to find another option.



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