Holley 2300 to Rochester 2G Two Barrel Intake Carburetor Adapter

#1351934

Holley 2300 to Rochester 2G Two Barrel Intake Carburetor Adapter

Name: Holley 2300 to Rochester 2G Two Barrel Intake Carburetor Adapter
Brand: Speedway Motors
SKU: 1351934
Price: 26.99 USD
Availability: InStock
Rating: 4.4 (34 reviews)

34 Reviews

16 Questions

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

$26.99

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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"

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Key Specs

MFG. Part #	1351934
Carburetor Flange Type	2-Barrel 4-Bolt
Carburetor Barrels	2-Barrel
Carburetor Quantity	One
Material Type	Aluminum

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Speedway Motors 1351934 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.

CA WARNING:

Can expose you to lead, a carcinogen and reproductive toxicant. See www.P65Warnings.ca.gov

CARB warning

Speedway Motors 1351934 Specifications

KEY SPECS
MFG. Part #	1351934
Brand	Speedway Motors
Carburetor Flange Type	2-Barrel 4-Bolt
Carburetor Barrels	2-Barrel
Carburetor Quantity	One
Material Type	Aluminum

GENERAL
Overall Thickness	.495"
Bolt Hole Pattern	Holley/Demon/Ford: 5.125" x 3.500", Rochester/Carter: 3.250 x 1.875
Gasket(s) Included	Yes
Hardware Included	Yes
Sold in Quantity	Each
Notes	Can also be used on a 2bbl intake with 3.75" x 2.00" pattern by filing away a small amount of material.
Finish	Natural

Ratings & Reviews

4.4

34 Reviews

Overall Assessment

Customers generally find this product excellent in terms of quality, functionality, and pricing. Notably appreciated are the adapter's perfect fit, easy application, and a positive influence on performance upgrades. Concerns have been raised about the thinness of the inner flanges and the quality of the provided hardware, particularly preferring Allen heads over flatheads. The product's compatibility varies - it worked perfectly for some customers' specific models and didn't fit others. However overall, it is seen as a reliable and high-quality product that's an easy and cost-effective alternative to changing the intake.

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4.4

34 reviews

Most Liked Positive Review

4.0

Upgrading from a BallxBall 2 barrel or a Rochester 2gc carb

Desired to upgrade the carb on my 1964 Plymouth Belvidere hardtop to a modern Holley two barrel. The stud spacing on my original Ball&Ball was 17/8 x 31/4. Your carb adapter which is adjustable from 17/8 x 31/4 to 21/16 x 311/16 fit the bill perfectly. I had the option of either a 350 cfm or a 500 cfm Holley and I chose to go with the 350 cfm model. It should be noted that those with GM products using the Rochester 2gc carb 21/16 x 311/16 base spacing can use this adapter as well. After running a hot wire to automatic choke, I was well on my way down the road. Thanks for a great product at a reasonable price.

Most Liked Negative Review

2.0

questionable Mounting hole flange

The inner holes have flanges to catch the bolts used to attach to the Rochester side of things are INCREDIBLY! thin, do not over tighten!

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Sort Reviews

Do not pay for the express shipping

1.0

2 months ago

Alabama

Verified

Still have not received my product paid to have it early still has not shipped

Would Not Recommend

Shouldn't need another one

5.0

3 months ago

Whiskers

Illinois

Verified

Awesome my carb is a 2 bolt so I have to modify it hopefully

Would Recommend

Good product

5.0

6 months ago

Jake

Wyoming

Verified

Fits like it should and works.

Would Recommend

Great product. Would buy again if needed.

5.0

9 months ago

Big Block

North Carolina

Verified

The adapter worked great. No issues with install.

Would Recommend

Great product

5.0

a year ago

REDD#56

PostFalls

Verified

Item came and was happy with quality and durability. I had doubts it would work but bolts right up with very little manipulation and got the job done.

Would Recommend

Nice quality. All you need to install is included

5.0

a year ago

Erkmar

Fort Wayne, IN

Verified

Nice quality. Thick gaskets.

Would Recommend

I would buy again

5.0

2 years ago

Indiana

Verified

Great price

Would Recommend

Fit great

5.0

2 years ago

Bob

Verified

Fit great dimensions spot on

Would Recommend

Did not fit.

4.0

3 years ago

A DIYER

Illinois

Verified

This did not fit Holley 2 barrel and did not fit the 1979 chevy 2 barrel Rochester. Didn't know it till it came in. Tis is made for early 60's Rochester 2 barrel

Would Not Recommend

Works great

5.0

4 years ago

Sparky

Gibbon NE

Verified

Put a 2 barrel Holley on a Cj7 258

Would Recommend

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Questions & Answers

16 Questions • 16 Answers

Sort Questions

Will this work as a spacer for a Motorcraft 2150 2 barrel?

by Josh

• 8 years ago

3 answers

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Will this adapt my 4412 bolt pattern to my Rochester 2g carb?

by Austin

• 9 years ago

2 answers

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Will this work on the manifold from a carter: Carter 2BBL Carburetor 0-2188 Dodge Chrysler Plymouth, rebuilt, 77 power wagon to a Holly 2300: https://www.holley.com/products/fuel_systems/carburetors/marine_carburetors/parts/0-80402-1 Yes, this is for a boat. Thanks for your time. :)

by winncomm

• 9 years ago

2 answers

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Will this work on a '69 Buick 350 V8 equipped with the factory 2Bbl I want to go to a Holley 500cfm 2 bbl Thanks!

by Junior

• 9 years ago

2 answers

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Was curious if this could be used as a spacer for a 2 barrel carb

by Michael

• 9 years ago

2 answers

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So I can adapt my 57 Olds J2 manifold with the small base 2GC Carburetor pattern of 1 7/8 X 3 1/4 to the newer 59-61 2GC base of 2 X 3 3/4 ? And if so what do I have to file on the adapter? Can you suggest a jet size to use with a high lift roller cam?

by Don

• 9 years ago

1 answer

View Answer

Looking at getting the edelbrock 5417 3x2 intake but want to use these adapter plates to change from small base rochesters to big holley 2300's, would these work? Thanks

by Possum trapper

• 9 years ago

1 answer

View Answer

I bought this to mount to a intake manifold that had a large base two barrel rochester carb on it and it does not fit. Will this fit a small base rochester intake?

by Jason

• 10 years ago

1 answer

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will this fit a rochester dualjet 210

by mc

• 10 years ago

1 answer

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Will this fit my 1985 s15 . I'm trying to replace the factory carb with a holly

by Mud truck

• 11 years ago

1 answer

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