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Holley

HOLLEY Pro-Series Secondary Linkage

MPN: 20-122 Catalog #: 001509233 Category: Carburetor Linkages Check Vehicle Fitment

Product Details

Secondary Linkage - Adjustable - Stainless - Natural - Mechanical Secondary Holley 4150 / 4150 HP Carburetors - Kit

Pro Series Adjustable Secondary Linkage Kit; Race; Stainless Steel; Allows User To Pick Between 1:1 Or Progressive Secondary Ratio;

Featuring stainless steel construction and a lightweight yet rugged design, it provides a bulletproof method of adjusting secondary on all double pumper, HP, and ultra HP carburetors. It allows user to pick between 1:1 or progressive secondary ratio. Kit provides infinite adjustment of secondary throttle blades for maximum horsepower output.

Fitment: Featuring Stainless Steel construction and a lightweight yet rugged design; it provides a bulletproof method of adjusting secondaries on all Double Pumper; HP; and Ultra HP carburetors. It allows user to pick between 1:1 or progressive secondary ratio. Kit provides infinite adjustment of secondary throttle blades for maximum horsepower output.

DETAILS:

Part Number 20-122 SPECS:

DETAILS:

  • Holley Performance Emission Code 5: This part is legal for sale or use on Emissions Controlled Vehicles; Uncontrolled (Non-Emissions Controlled) Vehicles; and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations
  • Carburetor Accelerator Linkage Kit
  • Pro Series Adjustable Secondary Linkage Kit
  • Choose Between A 11 And A Progressive Secondary Ratio
  • Compact Design Wont Interfere With Throttle linkage
  • Detailed Instructions Included
  • Includes All Necessary Hardware
  • Perfect For Circle Track And Drag Racing
  • Simple Installation
  • Tough Stainless Steel For Longevity/Durability/Control
  • HI-PERF ADJUSTABLE SEC LINKAGE
  • Carburetor Linkage

Part Number 20-122 SPECS:

  • Carburetor Style: Single Quad
  • Carburetor Type: 4150
  • Color: Zinc
  • Material: Steel
  • Usage: Automotive
  • WARNING CA Proposition 65: No

Vehicle Fitment

Universal or product-specific fitment. Please review the product details and contact us if you need help confirming fitment before ordering.

Product Specs

Brand
Holley
Part Number
20-122
Catalog Number
001509233
Product Line
Carburetor Linkages
Category
Fuel Delivery
Type
Carburetor Linkages
UPC / Barcode
090127605806
Length
7.00 in
Width
4.95 in
Height
2.15 in
Weight
0.06 lb
Freight / LTL
175.00
Ship Alone
No
Air Restricted
No
Hazmat
No
Chemical
No
Non-Returnable
No
Case Quantity
1
Kit
No

Shipping & Availability

Current status 24 Available - Ready to ship
Estimated timing Usually ships within 24hrs

This item is showing available inventory. Most in-stock performance parts ship quickly, but timing can vary by warehouse, vendor cut-off time, holidays, and carrier pickup.

Inventory shown: 24 available as of 6/4/2026.

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