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HOLLEY Hi-Perf Adjustable Sec Linkage

HOLLEY Hi-Perf Adjustable Sec Linkage

Original price was: £78.43.Current price is: £74.51. Inc. VAT

SKU: HOL20-122 Categories: , , Brand:

Description

Part Number: 20-122

Holley Pro Series Adjustable Secondary Linkage Kit

Achieve ultimate throttle response and precise secondary activation with the Holley 20-122 stainless steel adjustable secondary linkage kit.

Engineered for high-performance motorsport applications, the Holley 20-122 Pro Series Secondary Linkage Kit provides absolute precision when tuning secondary throttle blade opening rates on Holley 4150-style mechanical secondary carburettors. Whether you need a crisp 1:1 throttle blade ratio for aggressive drag racing starts or a smooth progressive ratio to eliminate off-idle lean spots during track driving, this kit allows infinite adjustment without linkage flex or binding.

Key Features & Benefits

  • ☑ Dual Ratio Modes: Easily toggle or fine-tune between 1:1 direct ratio and progressive secondary throttle blade operation.
  • ☑ Stainless Steel Construction: Premium corrosion-resistant stainless steel ensures maximum durability, zero flex, and reliable mechanical control under race conditions.
  • ☑ Infinite Secondary Adjustment: Allows micro-adjustments to secondary blade timing to dial out lean spots and optimize power transition.
  • ☑ Universal Holley Fitment: Tailored specifically for Holley Double Pumper, HP, and Ultra XP mechanical secondary carburettors.
  • ☑ Compact Design: Sleek profile prevents interference with throttle brackets, return springs, or secondary throttle stops.

Technical Specifications

Brand Holley
Manufacturer Part Number 20-122
Material Stainless Steel
Finish Natural Bare Stainless
Ratio Capability 1:1 or Progressive Secondary Ratio
Carburettor Compatibility Holley Double Pumper, HP, & Ultra XP Series
Adjustment Type Infinite Fully Adjustable Linkage

What’s Included in the Box

  • 1x Holley Pro Series Stainless Steel Secondary Linkage Assembly
  • Mounting Hardware & Attachment Clips
  • Installation Quick-Reference Guide

When every fraction of a second counts on track, precision engine response is non-negotiable. Holley performance carburettor components deliver race-proven dependability and unmatched tuning flexibility. Order your Holley 20-122 linkage kit from JP Racing today to benefit from expert technical advice, high-performance inventory, and rapid UK delivery.

Frequently Asked Questions

The Holley 20-122 Pro Series linkage kit is designed specifically for Holley 4150-style mechanical secondary carburettors, including all Double Pumper, HP, and Ultra XP series models. It is not intended for vacuum secondary carburettors.

A 1:1 ratio forces the primary and secondary throttle blades to open simultaneously and at the same rate, which is ideal for drag racing where immediate full-throttle air/fuel flow is required. A progressive linkage delays secondary opening until the primary blades reach approximately 40% travel, delivering smoother street and circuit drivability while eliminating low-RPM throttle stumble.

Standard linkage arms can suffer from flex or play over time, leading to inconsistent secondary throttle opening. The Holley 20-122 kit utilizes high-strength stainless steel to prevent flex, ensure precise throttle blade synchronization, and withstand harsh high-temperature motorsport environments.

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