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Holley 37-474 2 Barrel 500 CFM Rebuild Kit

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Holley 37-474 2 Barrel 500 CFM Rebuild Kit
Holley

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#42737474

Holley 37-474 2 Barrel 500 CFM Rebuild Kit

  • It fits Holley Model 2300 500cfm two barrel carburetors ONLY
  • Detailed instructions are also included to guide you through the rebuilding process
  • This rebuild kit contains all parts and gaskets that are necessary to restore “like new” performance to your carburetor
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$60.08

/each

In Stock

$66.75

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Product Summary

Universal Fit

  • It fits Holley Model 2300 500cfm two barrel carburetors ONLY
  • Detailed instructions are also included to guide you through the rebuilding process
  • This rebuild kit contains all parts and gaskets that are necessary to restore “like new” performance to your carburetor

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Key Specs

MFG. Part #37-474
BrandHolley
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Need To Know

Need help?

855.313.9176
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Quick and Easy Returns

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Holley 37-474 Details

Each Holley Renew Kit carburetor rebuild kit contains all parts and gaskets that are necessary to restore “like new” performance to your carburetor. Detailed instructions are also included to guide you through the rebuilding process. Start off the season with a quality Holley Renew Kit repair kit. It's your guarantee for trouble–free cruising.

Fits Holley Model 2300 500cfm two barrel carburetors ONLY.

  • Gaskets
  • O-Rings
  • Pump Diaphragm
  • Needle & Seat
  • Power Valve
  • Instructions

Charts

Rebates

Holley Heritage Sale 10% off Select Parts

Holley Heritage Sale 10% off Select Parts

Holley Heritage 10% Off Select Parts Sale, running from July 6, 2026, through July 31, 2026. For a limited time, customers can save 10% off on select parts, making it the perfect opportunity to upgrade your vehicle with high-quality components. Sale prices apply to purchases made during the sale period only. No rainchecks or exceptions will be provided. This sale cannot be combined with any other offers, discounts, or promotions.

Holley 37-474 Specifications

KEY SPECS
MFG. Part #37-474
BrandHolley
GENERAL
Sold in QuantityEach
GTIN Code090127059517

Ratings & Reviews

4.7

11 Reviews

Overall Assessment

Customers found our product to be highly practical and reliable. The product is a complete kit which provided everything they needed for successful servicing or rebuild. Users have noted that its quality is superior and its usability straightforward. The high-grade materials ensured the product performed as expected with no issues. Customers highlighted the kit's ability to service a Holley carb effectively, making it their top choice. Some customers compared it favorably to other Holley rebuild kits, emphasizing our product's comprehensive inclusions and clear instructions. Recommending our product, clients noted its capacity to keep even older vehicles running at peak performance.

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4.7

11 reviews

5

9

4

1

3

1

2

0

1

0

Most Liked Positive Review

4.0

almost everything i needed

I used this for my 56 ford vicky that had a 57' or 58' 2300 holly on it. every thing matched up except the new float adjust, mine must of been an older design where the top screw is built on to the rod. since the replacement was just the rod, I used the origional with the new O ring. seamed to work well.

Most Liked Negative Review

3.0

Good rebuild kit

This kit came with all the things to rebuild the carb in all of its different designs. I have used other Holley rebuild kits and they came with much better directions but with my carb type it was pretty self explanatory.

Filter by Ratings

Great product

5.0

2 years ago

JC

Iowa

Oem product and great quality

Would Recommend

Absolutely

5.0

4 years ago

Btrock

Boise idaho

Verified

Great product fast shipping

Great product

5.0

6 years ago

Tntitan68

Sacramento Ca.

Verified

Sprint car

Would Recommend

Everything needed

5.0

6 years ago

Cody

Russellville, AL

Verified

Used kit On a holley 4412 500 cfm

Would Recommend

Yes

5.0

7 years ago

Jeremy

La

Verified

Great

Would Recommend

Had everything i needed to complete a rebuilt

5.0

9 years ago

derby242

MN

Verified

Product worked great as it should

Would Recommend

Worked perfectly

5.0

11 years ago

Bryan50

Lee's Summit MO

The only way to service a Holley carb in my opinion. Great service and price from SPEEDWAY as always. Thanks for the help.

Would Recommend

Good rebuild kit

3.0

14 years ago

Chris

Minnesota

Verified

This kit came with all the things to rebuild the carb in all of its different designs. I have used other Holley rebuild kits and they came with much better directions but with my carb type it was pretty self explanatory.

Would Recommend

almost everything i needed

4.0

14 years ago

Matt McGuire

Yakima, WA

Verified

I used this for my 56 ford vicky that had a 57' or 58' 2300 holly on it. every thing matched up except the new float adjust, mine must of been an older design where the top screw is built on to the rod. since the replacement was just the rod, I used the origional with the new O ring. seamed to work well.

Would Recommend

You can do it too

5.0

15 years ago

29andholding

Guthrie, Oklahoma

Verified

Even though my Bronco is old, this product and others at Speedway keep it at top level

Would Recommend

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Showing 10 of 11 reviews

Questions & Answers

3 Questions • 4 Answers

What size accelerator diaphragm comes with this kit?

by Rookie

• 7 years ago

1 answer

View Answer

Will this fit my 4412 500? The primary is leaking. Possible pump leak.

by CT43

• 12 years ago

1 answer

View Answer

what size of power valve comes in the kit

by

• 14 years ago

2 answers

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