Corvette Ram Horns

[Lated]

Will these http://cgi.ebay.com/ebaymotors/72-80...QQcmdZViewItem work on my 70 C-10 or would the dump being straight down interfere with the crossmember?

[byrd]

I thinkthere is a typo in the listing, because the corvette manifolds have a 2 1/2" exit not a 2"

They will fit,but it is a pain and will require some crafty exhaust work

[N2TRUX]

As far as I know all Byrd is correct. All Corvette SBC ramhorns were either 2.5" or 3" not 2". They will work, but a custom built y-pipe will be required.

[Ace in the hole]

They look like the ones used for 4x4's. I believe all the 4x4 trucks dump strait down, at least they do on mine.
Here is another place on ebay for them- http://cgi.ebay.com/ebaymotors/EXHAU...QQcmdZViewItem
they have the angled outlet ones too.

[PICKMUP]

Those are just the common 2" rams that are sold for many chev vehicles, incl our trucks (4x4 & 4spd). The Ebay sellers like to use the "Corvette" on as many listings as they can...sounds special.
There were just a couple years of vettes, high HP, that used the 2.5" rams that flow much better than these.
The 2.5" can be used on 2wd trucks IF you use 45 degree mandrell bent short attaching pipes and a mini starter for clearance. Dorman makes/sells the 2.5 rams.

[BCOWANWHEELS]

they did use 2" outlet ram horns on vettes that didnt have hi-po engines

[VetteVet]

Originally Posted by BCOWANWHEELS

they did use 2" outlet ram horns on vettes that didnt have hi-po engines

This is correct as the ones on my 74 are 2" and it has the l-48 low output engine. Most of the c-3 years have these. 68-82 .

I have the straight dumps on my 67 SWB and the passenger side exhaust pipe had to be dimpled to clear the CM. They were custom made for the PO so I can't say what stock ones might do.

[Lated]

Looks like I could get a set of 2.5" Vette ram horns from Midway http://www.midwayautosupply.com/m-11...fold-kits.aspx for $125 shipped less than half the cost of the tri-y headers I was looking at. Will the ram horns flow anywhere near as well as the headers?

[hotrodhomi]

This is by far the best deal I could find. If you can find a new set cheaper, jump on it.

http://www.performanceexhaustplus.com/

Part number 674-504
Manifold - 1963-62 5.4L (327 CID) Corvette Ram's Horn, LH, 2-1/2" Dia. $57.45

Part number 674-503
Manifold - 1965-62 5.4L (327 CID) Corvette Ram's Horn, RH, 2-1/2" Dia. $57.45

Subtotal : $114.90
Shipping (Free Ground Service): $0.00
Tax : $0.00
Total : $114.90

[Curbstone Mech]

I got my set from pickmup, all cleaned up, painted, with the manderel bent 45deg pipe. They made my engine howl!

[hotrodhomi]

he was sold out when I was looking. the mandrel pipe can be ordered for about $15. Just ask for a 4" radius U bend made from 2.5" and cut it in half.

[Lated]

Are you talking about the Pickmup that is a board member?

[Curbstone Mech]

Later-
That be he.

[Lated]

Hah! I just realized Pickmup had already posted in this thread.

[Mondo]

Those 2 1/2in manifolds have molded in brackets for accessories towards the front. I don't need that and think it would look funny.

Wish I knew for sure those Speedway tube manifolds won't work on a 67 C10 smallblock... they're exactly what I was looking for.

[Classic Bowties]

Originally Posted by byrd

I thinkthere is a typo in the listing, because the corvette manifolds have a 2 1/2" exit not a 2"
They will fit,but it is a pain and will require some crafty exhaust work

Originally Posted by N2TRUX

As far as I know all Byrd is correct. All Corvette SBC ramhorns were either 2.5" or 3" not 2". They will work, but a custom built y-pipe will be required.

The only years GM offered/installed the 2.5 exhaust manifolds on the Corvette was 1962-65, they were also installed on the Chevy Impala and like full size pass. cars of the same years if equipped with the 300hp 327, GM never made any 3" sbc ramhorns. Any of the center dumping SBC ramhorn manifolds in 2" or even the better flowing 2.5" will fit & work just fine on the 67-72 k series, no crafty or custom exhaust work is needed for use on 4wd's, the center dump clearance issue comes into play on some C series/2wd's pending motor position. Cb

[Curbstone Mech]

Lated- No problemo. Where are you in md? I'm in Westminster.
Mondo- You can shave (grind) off the accessory bosses like pickmup did.
The kit he sells is very clean. I put a set on my daily driver GMC and it really woke up the tired 350.

[N2TRUX]

Originally Posted by Classic Bowties

..... GM never made any 3" sbc ramhorns. ...

Ya wanna come measure mine? 63-64 327 FI Ramhorns....

[Classic Bowties]

Originally Posted by N2TRUX

Ya wanna come measure mine? 63-64 327 FI Ramhorns....

No need to.... I can see & identify by your pic that you have got yourself a ground on/smoothed out set of 2.5" ramhorns. Yes, even the vette FI engines had the 2.5" outlets, heck for that matter even chevys mighty LS6-454, the L72-427 and even mopars elephant-426 hemi cars all came factory equipped (production models) with 2.5" outlet cast iron manifolds. Cb

[Lated]

[QUOTE=Mondo;2468307]Those 2 1/2in manifolds have molded in brackets for accessories towards the front. I don't need that and think it would look funny.

My somewhat less than acceptable (it's a pain to adjust belt tension) PO fabbed power steering bracket mounts to the brackets on the 2" ram horns I have now and it would be useful until a better bracket is available/affordable but I agree, it would look odd with nothing attached to it.

[cstanley]

[quote=Lated;2468865]

Originally Posted by Mondo

Those 2 1/2in manifolds have molded in brackets for accessories towards the front. I don't need that and think it would look funny.

My somewhat less than acceptable (it's a pain to adjust belt tension) PO fabbed power steering bracket mounts to the brackets on the 2" ram horns I have now and it would be useful until a better bracket is available/affordable but I agree, it would look odd with nothing attached to it.

can they be mounted reversed? where the bracket is at the back?

[hotrodhomi]

The can be mounted on either side. I cut the bracket off of mine.

[wibilly]

corect me if im wrong but that bracket mount was used to mount the altenator when heads with no accessory holes[camel humps] how was the ac mounted on the right side i want 21/2" ramhorns and have several sets or camel hump heads but want to put the factory ac compressor on my 4x4

[mexgrhd68]

Originally Posted by Lated

Will these http://cgi.ebay.com/ebaymotors/72-80...QQcmdZViewItem work on my 70 C-10 or would the dump being straight down interfere with the crossmember?

I have some on my 68, not those exact ones, but mine do dump in the center and no problem they fit perfect. They are on an 1984 305 engine out of a monte carlo.

[basketcase]

Here's another option. Starting in 1981 the Corvette manifolds were made of stainless with a 2" outlet. '82s were 2.5". They have the same dementions as the iron manifolds. I took off the heat shields and AIR tubes, welded up the holes and used Eastwood stainless coating on them. I cut the flared end off of a couple of new 2" head pipes I had around of unkown usage and have a mandrel bend to cut up to point the pipe away from the crossmember.

I paid $35. for these from a friend that had them on Ebay. They looked pretty nasty but a little work was all they needed.