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Product Summary

Universal Fit, .495" Overall Thickness, Aluminum

  • Adapts large Holley 2 bbl carbs to Rochester four-bolt 2 bbl manifold base
  • Includes gaskets and hardware
  • Features an open plenum design and measures 1/2" thick
  • Larger bolt pattern: 3-1/2" x 5-1/8"
  • Smaller bolt pattern: 1-7/8" x 3-1/4"

Key Specs

MFG. Part #1351934
Overall Thickness.495"
Bolt Hole PatternHolley/Demon/Ford: 5.125" x 3.500", Rochester/Carter: 3.250 x 1.875
Gasket(s) IncludedYes
Hardware IncludedYes

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Details

This aluminum carb adapter plate lets you adapt a large Holley 2300 series 2-barrel carburetor to a Rochester 2G 4-bolt 2-barrel intake manifold base. The adapter features an open plenum design and measures 1/2" thick. The carburetor adapter includes two gaskets and all necessary hardware to install.

  • Adapts Holley 2300 (or equivalent Ford/Motorcraft) to Rochester 2G/Carter intake
  • Smaller bolt pattern: 1-7/8" x 3-1/4"
  • Larger bolt pattern: 3-1/2" x 5-1/8"
  • Adapter is 1/2" thick

Note: With just a little work with a file, the adapter can also be used to adapt an intake manifold with a 2" x 3-3/4" bolt pattern to the Holley 2300/Ford/Motorcraft 2 barrel carburetor as well.

CARB Warning

For race/ off road use or for use on pre-1966 vehicles.

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway, or if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

Specifications

KEY SPECS
MFG. Part #1351934
BrandSpeedway Motors
Overall Thickness.495"
Bolt Hole PatternHolley/Demon/Ford: 5.125" x 3.500", Rochester/Carter: 3.250 x 1.875
Gasket(s) IncludedYes
Hardware IncludedYes
GENERAL
Material TypeAluminum
FinishNatural
Sold in QuantityEach
NotesCan also be used on a 2bbl intake with 3.75" x 2.00" pattern by filing away a small amount of material.
Carburetor QuantityOne
Carburetor Flange Type2-Barrel 4-Bolt
Carburetor Barrels2-Barrel