Bill Smith
Founder, 1929-2014
Speedy Bill
Since 1952
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Corvette Style 2-1/2 Inch Ram Horn Exhaust Manifold

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Specs
Material Type:
-
Sold in Quantity:
Each
Finish:
Natural
Flange Style:
Square Port
Collector Diameter :
2.50
Header Dimension A:
-
Header Dimension B:
5.30
Header Dimension C:
18.50
Gasket(s) Included:
No
Hardware Included:
No
Garage Sale:
No
Notes
These do NOT include gaskets or bolts. Center of head mounting bolt to bottom of collector flange is 4-3/16", to highest point of manifold is 2-3/4". Ports measure 1.31" square.
Corvette Style 2-1/2 Inch Ram Horn Exhaust ManifoldCorvette Style 2-1/2 Inch Ram Horn Exhaust Manifold
Corvette Style 2-1/2 Inch Ram Horn Exhaust Manifold

Click image to enlarge

Details

Reviews

Q & A

What's in the Box

These "rams horn" cast iron manifolds were patterned off the 1962-63 327 Corvette but are not OEM remanufactured manifolds. They feature the big 2-1/2" diameter outlets and have provisions to accept original alternator type brackets.

These headers are copies of the original headers on the 62-63 Corvettes and can be used on almost any small block application. The cast in brackets are for the water tank on the drivers side and generator bracket on the passenger side. These can be cut off and smoothed per customers preference. These are a square port configuration with 1-5/8” top to bottom and also side to side. Compare to your head port size for compatibility.

  • 1962-63 327 Corvette
  • 2-1/2" diameter outlets
  • Use on almost any small block application up until the advent of the LS series engines in 1999
  • Use with 3 bolt header reducer/collector
  • Sold each, specify right or left.
  • Gaskets and bolts/hardware are not included

Notes

  1. Both the left and right sides include a mounting boss on the front of the manifold. If it is not required or needed, it can be machined off if necessary by the end user / installer.
  2. Ports measure 1-5/16” side to side and top to bottom Has sufficient material for porting/matching to your head.
  3. If using on original '62-'63 Corvette:
    • Generator mounts on passenger side (right side, 4.5" bolt centers)
    • Water tank mounts on drivers side (left side, 3.5" bolt centers)

These manifolds will bolt onto the Chevy small block engines up until the advent of the LS series engines in 1999. They are copy of the stock 62-63 Corvettes where the passenger side manifold is cast with the boss for the generator and the drivers side is cast with the mounting boss for the water tank. This is reverse of the later years and the possibility of adapting to different accessories such as the A/C compressor would be up to the installer. These are specific to the 62-63 Corvette for accessory mounting.  No issues with high compression engines have been noted.

These manifolds will work with the standard port small block Chevy engines. Fit to your application can be verified by some basic measurements as follows: * A” dimension from the head to outer edge of the collector flange is 4-1/32” * Center of head mounting bolt to bottom of collector flange is 4-3/16” * Center of head mounting bolt to highest point of manifold is 2-3/4” * Right Manifold: Accessory bolt boss center-to-center is 4.5" * Left Manifold: Accessory bolt boss center-to-center is 3.5" The outlet is directly below the center two ports on the head. You will need to verify clearance on your steering and cross member for exhaust hook up.

Specs

9300327-L
  • Header Dimension A: 4.00"  Manifold Dimensions (GIF)
  • Overall Length: 20.25"
  • Overall Height: 6.50"
  • Center to Center: 3.50"
  • Collector Diameter: 2.50"
  • Notes: Center of head mounting bolt to bottom of collector flange is 4-3/16", to highest point of manifold is 2-3/4"

9300327-R

  • Header Dimension A: 4.0313"  Manifold Dimensions (GIF)
  • Overall Length: 21.00"
  • Center to Center: 4.50"
  • Collector Diameter: 2.50"
  • Inlet Size: 1.3125"
  • Notes: Distance from head mounting bolt to collector flange bottom is 4.1875". Center of head mount to highest point is 2.75".

Item Details

Both L and R sides include alternator boss

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