Will these down pipes work? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Sport/Truck · 05-01-2011, 05:02 PM

I was talking to Summit and he said these would probably work?
http://www.summitracing.com/parts/PY...n/?prefilter=0
What's the census here, will they work on my stock ram horns?

**Boog** · 05-01-2011, 05:36 PM

Since the application does not include trucks I am sceptical. The amount of drop may be different than that on a truck. Also stock truck ram horns are 2" not 2 1/2. What I do see is it looks like those pipes are stepped so maybe they are 2" at the flange.

Sport/Truck · 05-01-2011, 06:59 PM

I think it's worth a call in the AM to get more details. I'd like to know the length from the manifold and the length after the bend.

Sport/Truck · 05-02-2011, 09:51 PM

I found this thread where Bruce88 used these, so I ordered mine today.
http://67-72chevytrucks.com/vboard/s...318544&page=13

Does anyone have a recommendation for a good donut gasket I should use (or stay away from)?
The exhaust guy was mentioning something about some hard type, but not clear on what he was suggesting?
s/t

Bruce88 · 05-03-2011, 03:30 PM

Hi Sport/Truck

You sent me a private message concerning the down pipe sleeve and the one down side to the message is that I’m unable to attach a simple picture to it. Maybe this simple picture will help you understand the inner sleeve on the down pipe to the manifold and how it works.

Bruce
Name: Down-Pipe-Inner-Sleeve.gif
Views: 128
Size: 8.8 KB

Name: Down-Pipe-Inner-Sleeve.gif
Views: 128
Size: 8.8 KB

05-01-2011, 05:02 PM	#1
Sport/Truck Sierra Grande Club Join Date: Jan 2007 Location: New Mexico USA Posts: 2,433	Will these down pipes work? I was talking to Summit and he said these would probably work? http://www.summitracing.com/parts/PY...n/?prefilter=0 What's the census here, will they work on my stock ram horns? __________________ 1971 GMC Sierra Grande, 1/2 ton short wide, original 4 bolt 010 020 block & heads. (matching #'s). 383 stroker, SMI q jet 750 cfm, Lunati Voodoo 60102 cam, Scorpion roller rockers, Spin Tech pro street mufflers with X pipe.

05-01-2011, 05:36 PM	#2
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 13,514	Re: Will these down pipes work? Since the application does not include trucks I am sceptical. The amount of drop may be different than that on a truck. Also stock truck ram horns are 2" not 2 1/2. What I do see is it looks like those pipes are stepped so maybe they are 2" at the flange. __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross

05-01-2011, 06:59 PM	#3
Sport/Truck Sierra Grande Club Join Date: Jan 2007 Location: New Mexico USA Posts: 2,433	Re: Will these down pipes work? I think it's worth a call in the AM to get more details. I'd like to know the length from the manifold and the length after the bend. __________________ 1971 GMC Sierra Grande, 1/2 ton short wide, original 4 bolt 010 020 block & heads. (matching #'s). 383 stroker, SMI q jet 750 cfm, Lunati Voodoo 60102 cam, Scorpion roller rockers, Spin Tech pro street mufflers with X pipe.

05-02-2011, 09:51 PM	#4
Sport/Truck Sierra Grande Club Join Date: Jan 2007 Location: New Mexico USA Posts: 2,433	Re: Will these down pipes work? I found this thread where Bruce88 used these, so I ordered mine today. http://67-72chevytrucks.com/vboard/s...318544&page=13 Does anyone have a recommendation for a good donut gasket I should use (or stay away from)? The exhaust guy was mentioning something about some hard type, but not clear on what he was suggesting? s/t __________________ 1971 GMC Sierra Grande, 1/2 ton short wide, original 4 bolt 010 020 block & heads. (matching #'s). 383 stroker, SMI q jet 750 cfm, Lunati Voodoo 60102 cam, Scorpion roller rockers, Spin Tech pro street mufflers with X pipe.

05-03-2011, 03:30 PM	#5
Bruce88 Registered User Join Date: Oct 2008 Location: Everett, WA Posts: 326	Re: Will these down pipes work? Hi Sport/Truck You sent me a private message concerning the down pipe sleeve and the one down side to the message is that I’m unable to attach a simple picture to it. Maybe this simple picture will help you understand the inner sleeve on the down pipe to the manifold and how it works. Bruce __________________ My Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=318544



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