My Account
My Garage
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order
MY GARAGE Select Vehicle
MY GARAGE

Proform Parts 67100C Aluminum Carburetor Main Body for Holley 4777

Part of: Proform Parts Carburetor Main Body for Holley Double Pumper

Other options in this family: Proform Parts 67108C

Manufacturer

Picture for manufacturer Proform Parts

Part Number

67100C
12 reviews
Sale Price

$158.95

1 left at this price

delivery box

Usually delivered within 2 days

free shipping

FREE SHIPPING

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Proform Parts 67100C is a high-performance aluminum carburetor main body designed as a direct replacement component for Holley #4777 carburetors. This upgrade transforms a standard street carburetor into a high-performance unit, delivering an estimated 25-50 additional horsepower in under 30 minutes of installation time.

Key Features:

  • 100% new aluminum construction (not rebuilt components)
  • Adjustable screw-in air bleeds for precise tuning
  • High-performance down-leg boosters for improved fuel atomization
  • Maximum airflow design with no air horn, choke tower, or choke control restrictions
  • Direct swap-in installation using your existing metering blocks, fuel bowls, and baseplate
  • Simple 14-screw installation process

What's Included:

  • Aluminum main body
  • Complete installation instructions
  • Non-stick replacement gaskets
  • High-performance jet kit

Technical Note: This main body does not retain the vacuum advance port found in the original metering block. This performance-focused design prioritizes maximum airflow and power gains over emissions and vacuum-operated accessories.

Manufactured by Specialty Auto Parts USA, Inc., this component offers an affordable path to significant carburetor performance improvements without purchasing an entirely new unit.

Products specifications

Accelerator Pump Discharge Nozzle Included

Yes

Air Bleed Material

Brass

Air Bleeds Included

Yes

Booster Type

Down-leg

Fuel Bowl Gaskets Included

Yes

Fuel Bowl Screw Gaskets Included

Yes

Jet Material

Brass

Jet Sizes Included

72/84

Jets Included

Yes

Main Body Finish

Zinc iridited

Main Body Gasket Included

Yes

Main Body Material

Cast zinc

Metering Block Gaskets Included

Yes

Metering Plate Gaskets Included

No

Notes

Includes two 36 air bleeds for the secondary outer air bleeds. This carb body does not have a passage to operate a vacuum advance.

Primary Discharge Nozzle Size (in)

0.031 in.

Primary Inner Air Bleed Sizes Included

36

Primary Outer Air Bleed Sizes Included

73

Quantity

Sold individually.

Secondary Discharge Nozzle Size (in)

0.031 in.

Secondary Inner Air Bleed Sizes Included

36

Secondary Outer Air Bleed Sizes Included

73

Technical Note

Main body does not retain vacuum advance port in original metering block.

Material

Aluminum

Category

Carbs

Finish

Natural

Fuel

Gasoline

First time customer. Super price, easy order, fast processing and delivery. Will definitely do more business in future.

Great customer service very satisfied with the product.

So Far So good . First order maybe of many . We'll see how it goes

easy to order

Perfect fit, like the original. Im very pleased, thank you.

All good

Quick and easy.

Billing/shipping db is a little quirky.

Great item, As described, Expertly packed & Shipped FAST! Superb seller!!

quick , easy , priced right

I ordered a Derale 14204 Trans oil pan from Autoplicity -<br>it arrived quickly, in good shape (was well packed for shipment)<br>More than pleased.... (best price was a bonus)<br>-HBP-

The order number 15547 tailgate lock fit perfectly. The shipping was very fast, ordered on Tuesday, delivered on Saturday. Will order from again.

Share icon
Return Policy
Returns are easy at Autoplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy