2.5" rams horn exhaust manifolds

[DUTCHMAN]

Does anybody know if there are new 2.5" rams horn exhaust manifolds for sale for our trucks?
I know the 2" are.

[Tx Firefighter]

Sure, you can get 2.5 ramshorns from a lot of places. The reason you're having a hard time finding them is that they are called Vette manifolds. Trucks had 2 inch, Vettes 2.5 inch.

Last I saw, Summit has them under the Dorman brand.

[DUTCHMAN]

Thanx TX Firefighter, but will they fit, because they go straight down instead of angle a bit?

[KSCHEVYUP]

I don't know about fit;
but Speedway Motors carries them also.

[Boog]

I hear the straight down horns in a 2 wheel drive setup it's a real tight turn with the headpipes clearing the crossmember and oil filter, starter. In a 4 wd setup it may work.

[JohnOstuff]

I've got em in my 4x4 and the right side works fine on a 4x2, but the left is where you have a really tight fit... oh and I got mine on Ebay but had to grind a lot of slag and the old style alt bracket off as well.

[72freak]

2x4's you have to have a good exhaust man or pipe fabricator to make it work unless the engine is slid back. Anything is possible....Im about to do it.

[JohnOstuff]

That's a good thought - 6 cyl frame mounts will move the engine back to the same spot as a 4x4 the crossmember might still be close but much better -
Posted via Mobile Device

[Tx Firefighter]

I can confirm both.

The straight dump manifolds are a challenge for the exhaust shop on V8 engine mounts. It can be done, just takes more finesse. And, the inline 6 engine mounts mounts move it far enough back to make the pipes very easy.

You just have to decide what route is best for you in light of having to shorten the driveshaft and monkey with the shift linkage when moving the engine back.

[jerry moss]

i've got 26 years in the same muffler shop and the straight dump 2 1/2 manifolds are a pain in the a$$ on a 2wd with the motor in the stock location. it CAN be done but it's not fun. unless the shop has a modern bender the bends won't be pretty either. i believe the vette manifolds are still available from GM, that's where i bought mine a few years back. i did have to cut off the old style generator/alternator brackets. they are the next best option to headers-without the leaks,lol.

[DUTCHMAN]

OK guys thanks for the advice. My engine is slid back a little and I know a good exhaustshop so I'm going to try it.
For what I read they are less noisyer and not leaking again and again like my headers.

ronald

[Thatguy]

Here is some on Jegs, I will be ordering these shortly for my 70 4x4 'burb. They are the 2.5 incher's.....http://www.jegs.com/i/Wysco/938/MA03...0002/-1:metal:


Looking for some more 67-72 members on Facebook! http://www.facebook.com/pages/1967-1...12378278777413

[matt67350]

Try this http://www.stevensparts.com
Good luck,
Matthew

[N2TRUX]

They clean really pretty too...

[DUTCHMAN]

Originally Posted by Thatguy

Here is some on Jegs, I will be ordering these shortly for my 70 4x4 'burb. They are the 2.5 incher's.....http://www.jegs.com/i/Wysco/938/MA03...0002/-1:metal:


Looking for some more 67-72 members on Facebook! http://www.facebook.com/pages/1967-1...12378278777413

Saw them too on Jeg's but on the site from Wysco they say that they are 2.1/4 instead of 2.5.
Don't know if that make's that much of a difference??

[JohnOstuff]

Those Jegs exhaust manifolds look great, I would guess I put at least 2 hours of clean up into the China made ones I bought on Ebay and they look almost that good.

[72freak]

I just ordered a set of 2.5's and my engine is in the stock V8 possition. I should have it to the muffler shop next week. I will post pictures if he can do it.

[MARKDTN]

Another option instead of the Ram Horns is C4 (84-96) Corvette manifolds. There are 2 styles, one for the Cross-Fire and Tuned-Port engines and another for the LT1s. The Early one is like a mini header. The LT1 one is cast iron. Both have true 2 1/2" outlets and both are overall dimensionally similar to a ram-horn manifold. If you buy the LT1 ones, insist on removing the heat shield before you buy. Some have a bad habit of cracking.

By the way, on a Corvette the last application of the 2 1/2" ram-horn was in '63. All the way '64-82 the outlet on a small-block was 2". Some of the hi-po small blocks had 2 1/2" exhaust, but they were 2" off the manifold and became 2 1/2" where they turned back. It is tight on a SB '63-82 Corvette on the right side idler arm using 2 1/2" in this area.

[ZombieWeinerDog]

i have a set of the vette manifolds, i just replaced them with headers, do they really flow better than most headers? i like the sound of the headers more.

[OrangeCrush1970]

Headers will always be king when it comes to sound...but you have to constantly tighten the header bolts or deal with exhaust leaks and replacing manifold gaskets. I have herd some trucks with the maifolds that sound great, too. Manifolds are just a little quieter.

[8door]

Originally Posted by MARKDTN

Another option instead of the Ram Horns is C4 (84-96) Corvette manifolds. There are 2 styles, one for the Cross-Fire and Tuned-Port engines and another for the LT1s. The Early one is like a mini header. The LT1 one is cast iron. Both have true 2 1/2" outlets and both are overall dimensionally similar to a ram-horn manifold. If you buy the LT1 ones, insist on removing the heat shield before you buy. Some have a bad habit of cracking.

By the way, on a Corvette the last application of the 2 1/2" ram-horn was in '63. All the way '64-82 the outlet on a small-block was 2". Some of the hi-po small blocks had 2 1/2" exhaust, but they were 2" off the manifold and became 2 1/2" where they turned back. It is tight on a SB '63-82 Corvette on the right side idler arm using 2 1/2" in this area.

I just discovered the 350/290hp crate recommends 2 1/2" exhaust.
Of course after I went out and located a beautiful set of Ram Horns with the
alternator mount lugs on passenger side, and had a shop bend up a set of pipes back to under the cab ready for mufflers.
Then like a real dummy just now looked at the specs for the engine.
Been reading a lot of exhausting lol detail about problems installing 2 1/2 pipes, and you come up with Vette 2" manifolds into 2 1/2"head pipe.
I wonder if the engine will be that much affected by the smaller exhaust size ? If for performance , racing and breaking things loss every one in awhile ya, but for every cruising?

[heymoe]

I have the 2 1/2" vette style installed on my truck. It is very tight to the starter but possible. My exhaust is 2 1/2" polished tube tucked up into the frame.

[8door]

heymoe:That is a great looking drive line. Was that your idea on pipe routing ?
The starter appears smaller than stock ?

[CheyenneShop]

Originally Posted by heymoe

I have the 2 1/2" vette style installed on my truck. It is very tight to the starter but possible. My exhaust is 2 1/2" polished tube tucked up into the frame.

This thing looks great! Do you have any more pics (close up) of the manifolds and there closeness?

[67chevy1series]

Originally Posted by N2TRUX

They clean really pretty too...

you smoothed didnt you! i am deffinatly doing that to mine!!!!!!!!!!!!!!