Rams horn manifold question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

70Custom10Nut · 03-13-2010, 07:41 AM

Do the factory Rams Horn manifolds come in different sizes? How well do they flow? I've seen them called "Rams horn Headers", but they all look about the same. My engine is a little warmer than stock, so I don't need super hi flow headers. Actually, I'm beginning to think the lack of back pressure in my system (shorty headers into 2 1/2 inch tube and mini turbo muffs) is causing the hesitation I have.
Reason I ask is I can get a pair for next to nothing, and as another board member said, it does away with the constant gasket failure on a header setup. Cnut

JimKshortstep4x4 · 03-13-2010, 08:44 AM

Rams horn exhaust manifolds come in 2" and 2 1/2" sizes. They probably will not flow as well as your headers.

Jim

**LockDoc** · 03-13-2010, 10:08 AM

Quote:

Originally Posted by JimKshortstep4x4

Rams horn exhaust manifolds come in 2" and 2 1/2" sizes. They probably will not flow as well as your headers.

Jim

I agree that the 2 1/2" Rams Horns won't flow as good as headers but didn't they come stock on the high performance corvettes?

LockDoc

OhOneWS6 · 03-13-2010, 10:28 AM

I thought the Vette ram horn and truck ram horn were different. The Vette ones are the better flowing ones. The truck ones with the kink at the bottom are the more restrictive ones. Not sure how the truck ones that are not kinked compare to the Vette ones.

70Custom10Nut · 03-13-2010, 11:08 AM

Thanks for the info. I'm going to measure them before I buy them. I think they're the 2" though, and wouldn't do what I want. Thanks again, Cnut

**Stocker** · 03-13-2010, 12:56 PM

Quote:

Originally Posted by LockDoc

I agree that the 2 1/2" Rams Horns won't flow as good as headers but didn't they come stock on the high performance corvettes?

LockDoc

Yes. Dunno how they might differ from any other rams horns... Both my '65 Corvette (327/365, same as fuelly but carbureted) and my '66 327/350 (highest output on hydraulic lifters) had factory rams horns.

Sure wish I still owned those cars...

Jim 383 · 03-13-2010, 09:40 PM

not cheap but speedway motors sells TruRam manifolds for chevys and y block f**ds

Wrenchbender Ret · 03-14-2010, 12:14 PM

The Corvette type Ramhorns w/ 2 1/2 in. outlets are reproduced now & are not expensive.

**KSCHEVYUP** · 03-15-2010, 10:22 AM

If anyone is interested.
Speedway Motors sells a 2- 1/2" Corvette Style exhaust manifold for $59.95 each.
These were patterned off of the early 60's 327 Corvette
If someone knows of a better price maybe they will post up here?
Ron

03-13-2010, 07:41 AM	#1
70Custom10Nut Registered User Join Date: Sep 2007 Location: Vilseck Germany (currently) Posts: 317	Rams horn manifold question Do the factory Rams Horn manifolds come in different sizes? How well do they flow? I've seen them called "Rams horn Headers", but they all look about the same. My engine is a little warmer than stock, so I don't need super hi flow headers. Actually, I'm beginning to think the lack of back pressure in my system (shorty headers into 2 1/2 inch tube and mini turbo muffs) is causing the hesitation I have. Reason I ask is I can get a pair for next to nothing, and as another board member said, it does away with the constant gasket failure on a header setup. Cnut

03-13-2010, 08:44 AM	#2
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	Re: Rams horn manifold question Rams horn exhaust manifolds come in 2" and 2 1/2" sizes. They probably will not flow as well as your headers. Jim __________________ 1971 Shortbox step side 4x4, 350 sbc, 3:07 rear end 1965 Impala SS 400 sbc, Muncie rock crusher 1966 Impala SS 396 bbc, TH 400 1969 El Camino, 350 sbc, TH 350 1971 Snowplow built on a Blazer frame 1972 GMC Short bed, stepside, TH 400, 427 BBC

03-13-2010, 10:28 AM	#4
OhOneWS6 Registered User Join Date: Dec 2009 Location: DFW, TX Posts: 764	Re: Rams horn manifold question I thought the Vette ram horn and truck ram horn were different. The Vette ones are the better flowing ones. The truck ones with the kink at the bottom are the more restrictive ones. Not sure how the truck ones that are not kinked compare to the Vette ones. __________________ 72 Cheyenne Super 1/2 LWB White/Dark Yellow 07 Avalanche 2LT 74 Sleek Craft Rebel Jet Boat W/Pontiac 400

03-13-2010, 11:08 AM	#5
70Custom10Nut Registered User Join Date: Sep 2007 Location: Vilseck Germany (currently) Posts: 317	Re: Rams horn manifold question Thanks for the info. I'm going to measure them before I buy them. I think they're the 2" though, and wouldn't do what I want. Thanks again, Cnut

03-13-2010, 09:40 PM	#7
Jim 383 Registered User Join Date: Sep 2009 Location: Anaheim CA Posts: 16	Re: Rams horn manifold question not cheap but speedway motors sells TruRam manifolds for chevys and y block f**ds

03-14-2010, 12:14 PM	#8
Wrenchbender Ret Registered User Join Date: Oct 2005 Location: Overland Park, Ks. Posts: 5,204	Re: Rams horn manifold question The Corvette type Ramhorns w/ 2 1/2 in. outlets are reproduced now & are not expensive.

03-15-2010, 10:22 AM	#9
KSCHEVYUP Senior Member Join Date: Nov 2003 Location: NEAR MARYSVILLE,KANSAS 66508 Posts: 469	Re: Rams horn manifold question If anyone is interested. Speedway Motors sells a 2- 1/2" Corvette Style exhaust manifold for $59.95 each. These were patterned off of the early 60's 327 Corvette If someone knows of a better price maybe they will post up here? Ron __________________ 1972 C30 Cheyenne Super 1971 C10 (Parts truck)



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