Fitting 2.5 exhaust to stock ram's horn - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Sport/Truck · 04-17-2011, 11:21 AM

I'm going to use my original 45* angled ramhorns and wanted to see what adaptors you'all are using.
Any ideas and / or links appreciated.
Thanks,
s/t

yfs200p · 04-17-2011, 11:30 AM

Im using Stock ram horns (straight dump 4x4) and would like to see this as well. I'm going to run 2.5" also

TTT

Dzlhead · 04-17-2011, 03:39 PM

I'd like to know also. I'm using my original 4x4 straight dumps, and hope to go with 2.5'', but on a Jimmy.

Sport/Truck · 04-17-2011, 06:20 PM

IIRC the straight down rams horns are already 2.5 in?
I found this and think is might solve both our dilemmas.

http://www.castheads.com/corvette_systems.php

http://www.castheads.com/log_systems.php#manifolds

brad_man_72 · 04-17-2011, 07:09 PM

I know on a buddies truck they went from 2" tube to 3" tube with...... Weld! They must have used half a roll of wire.

Sport/Truck · 04-17-2011, 08:10 PM

Quote:

Originally Posted by brad_man_72

I know on a buddies truck they went from 2" tube to 3" tube with...... Weld! They must have used half a roll of wire.

The options the muffler shops here aren't far from that!

I'm looking to have a clean transition and hope this will work for me.

SCOTI · 04-17-2011, 08:51 PM

Speedway Motors has a decent head pipe set-up w/a 2.5" flange....
http://www.speedwaymotors.com/Tight-...-Kit,1722.html

Vintage Windmills · 08-21-2012, 02:04 PM

Curious if anyone ended up buying the adapter kits above.

Also, do you use special hardware for attaching the ram horns to the heads or just plain bolts, Grade 8?

**70CHEVYBB** · 08-21-2012, 09:28 PM

who's doing your exhaust (home build or muffler shop)? I have been working at a Meineke for 24 years, just a guess but I have probably custom bent exhaust for 100 plus 67-72 chevy trucks. All I do is use a 2" reducer after I bend the front pipes,flare it for the donut and press in a piece of 2" to make the donut sleeve. very simple process.

Wes

04-17-2011, 11:21 AM	#1
Sport/Truck Sierra Grande Club Join Date: Jan 2007 Location: New Mexico USA Posts: 2,433	Fitting 2.5 exhaust to stock ram's horn I'm going to use my original 45* angled ramhorns and wanted to see what adaptors you'all are using. Any ideas and / or links appreciated. Thanks, 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.

04-17-2011, 11:30 AM	#2
yfs200p E.H.F.D Engine #2 Join Date: Feb 2003 Location: East Hampton, NY Long Island Posts: 916	Re: Fitting 2.5 exhaust to stock ram's horn Im using Stock ram horns (straight dump 4x4) and would like to see this as well. I'm going to run 2.5" also TTT __________________ -NICK '72 K10 SWB Fleetside. Avocado Highlander 350-4speed-NP205 Frame Off Re-Creation '89 GMC V3500 C/C Flatbed Plow Truck 454/SM465/Np205 '15 Chevy 2500HD CCSB High Country Duramax '22 Tahoe Premier Duramax

04-17-2011, 03:39 PM	#3
Dzlhead Registered User Join Date: Jan 2009 Location: Brookfield,WI Posts: 50	Re: Fitting 2.5 exhaust to stock ram's horn I'd like to know also. I'm using my original 4x4 straight dumps, and hope to go with 2.5'', but on a Jimmy. __________________ '66 C-10 Panel '72 Jimmy 4x4

04-17-2011, 06:20 PM	#4
Sport/Truck Sierra Grande Club Join Date: Jan 2007 Location: New Mexico USA Posts: 2,433	Re: Fitting 2.5 exhaust to stock ram's horn IIRC the straight down rams horns are already 2.5 in? I found this and think is might solve both our dilemmas. http://www.castheads.com/corvette_systems.php http://www.castheads.com/log_systems.php#manifolds Attached Images __________________ 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. Last edited by Sport/Truck; 04-17-2011 at 06:42 PM.

04-17-2011, 07:09 PM	#5
brad_man_72 the boat guy Join Date: Jul 2007 Location: springfield mo Posts: 2,339	Re: Fitting 2.5 exhaust to stock ram's horn I know on a buddies truck they went from 2" tube to 3" tube with...... Weld! They must have used half a roll of wire.

04-17-2011, 08:51 PM	#7
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,031	Re: Fitting 2.5 exhaust to stock ram's horn Speedway Motors has a decent head pipe set-up w/a 2.5" flange.... http://www.speedwaymotors.com/Tight-...-Kit,1722.html __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

08-21-2012, 02:04 PM	#8
Vintage Windmills Vintage 4x4s Join Date: Sep 2010 Location: Prior Lake, MN Posts: 4,305	Re: Fitting 2.5 exhaust to stock ram's horn Curious if anyone ended up buying the adapter kits above. Also, do you use special hardware for attaching the ram horns to the heads or just plain bolts, Grade 8? __________________ 67 GMC K1500 Custom- 305V6 SM420, PTO, Ram Assist, yellow (the outcast) (project period correct upgrades) 67 GMC C2500 351V6 TH400, AC, PS, PB (can't decide what to do with. Update, decided to keep and will restore ) 86 CHV K30 502 th400, apple red NEW 71 CHV K20 350 SM465, ochre (saved work truck) 71 CHV K20 292 SM465, white, tach, PTO, (future project) 72 CHV K20 350 350th, medium blue (project stocker) 01 CHV K2500hd crew, indigo blue ^3 dont run and the others don't see winter either '86 K30 Cummins "Fireside" thread: http://67-72chevytrucks.com/vboard/s...d.php?t=649649 '71 K20 "get driveable" thread: http://67-72chevytrucks.com/vboard/s...d.php?t=590642 '72 K20 Build Thread: http://67-72chevytrucks.com/vboard/s...=493477&page=6

08-21-2012, 09:28 PM	#9
70CHEVYBB Senior Member Join Date: Feb 2012 Location: chillicothe, illinois Posts: 690	Re: Fitting 2.5 exhaust to stock ram's horn who's doing your exhaust (home build or muffler shop)? I have been working at a Meineke for 24 years, just a guess but I have probably custom bent exhaust for 100 plus 67-72 chevy trucks. All I do is use a 2" reducer after I bend the front pipes,flare it for the donut and press in a piece of 2" to make the donut sleeve. very simple process. Wes



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