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THe best factory exhaust manifolds were the rams horn design, they came on many cars from the 60`s, especially the corvettes. However, if you find any they may not clear the the cross frame under the engine, you`d have to do a trial fit to see.
 

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DoubleVision- That's good to know...I put them on My '49 Chevy Truck because I liked the "old school" look of the ram horns, I didn't know that they flowed better than the rest.
 

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Most were of the 2" variety and reportedly flowed better than the factory "logs". If you can exit straight down, try to find a set of the 'vette 2 1/2" rams. They make a big difference. I have a set on my '67.

Last I saw you could still buy them, new, for about $200. You still see them on EBay, but buying frenzy usually takes them out of sight.
 

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The 2.5"-exit Corvette ram's horns are still available from GM. They're about $130 each.

pn 3797901 left side
pn 3814970 right side

Many full-size cars & pickups from the '60s had ram's horn manifolds, but they were the smaller ones (2" exit). Some had a slight turn-back to clear crossmembers & mounts, etc.
 

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The Block Hugger tube Headers would be another choice. They are of the shorty design and are great in tight engine compartments.
 

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Discussion Starter #9
summit has a set of block huggers for $79. I think that beats the salvage yard price for a used piece. only question is ,will it fit?
 

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Without actually test fitting them, you would do well to do some measuring in your engine compartment.

Measure how far offset from the center of the 4 exhaust ports to the rear side of your motor mounts are (should be around a couple inches). Then call Summit and find out if the collector is in the exact center of the exhaust ports, add in 1/2 the collector OD and see if it fits in your mount offset measurement.

I think I explained that clearly, I am looking at sbc blueprints right now.
 

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jimfulco said:
Many full-size cars & pickups from the '60s had ram's horn manifolds, but they were the smaller ones (2" exit). Some had a slight turn-back to clear crossmembers & mounts, etc.
SPECIFICALLY WHICH (non-Corvette) full size cars/pickups from the 60s had ram's horns?

I've never heard of any w/ a 'turn back' - can you provide some specific examples of this?
 

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My 71 gmc 3/4 ton 350 had those,who knows if they are original,a lot can change over 30+ years,something to consider while scavenging. Another thing,the old ones you find may be crystallized,maybe not enough to see,if it were me,I would get a new set and port match em.
 

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I've attached pics of some of the various rams horns out there.

The top is the 2 1/2" Corvette. Next is the standard 2". The bottom two are the turned back ones that were used on trucks and Novas.

You could find them on just about ANY Chevy.
 

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my 65 chevy truck came with rams horn from the factory.they exit straight down.the exhaust shop got 2 1/4 pipes on them and then expanded to 2 1/2 to flowmasters. you can buy them from LMC truck for about 150$ a piece.
 

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Look on page 96 of the Dec 2004 Rod & Custom (on the news stand now), in the Rod Shop section. Speedway Motors (speedwaymotors.com, 402-323-3200) just announced an all new version of the cast iron ram's horn. To new for their web site. Claim is to give the stock hi-po cast iron look with better flow than even the hi-po old 'Vette ones and give block hugging fit for tight engine compartments.
 

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current hot rod: CTS-V
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Rams Horns are the best stock manifolds.

Hooker makes full lengths for your car $150. I know, I have a pair on my 86 two door caprice, 350.

They are Jegs part# 520-2451.

They weren't a great fit, but I got them in. Mine cost an extra $180 because they are ceramic coated.



With the headers your alternator bracket, and the large AC/Power Steering bracket won't fit. You have to customize.
 

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Discussion Starter #17 (Edited)
and i just have to remove my drivers' fender to intall. haha or i mean lol..

great example pictures. how much massaging did you have to do. it looks like they dont hang under bad at all. i am impressed and always liked hooker. can you getto your spark plugs ok?
 

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current hot rod: CTS-V
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haha, no that fender needs replaced so it's off only for that reason. However to get the drivers side header in I had to undo the motor mount and lift it up with my hoist. I also had to modify the brace that hooks to the frame and the control arm.

I did not have to put any bends in the headers to get them in.

I used Bosch plugs, they are about 1/4"-3/8" shorter than the A/C Delcos, and there is plenty of room between the spark plug and the header.
 
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