Description

Diaphragm Cover – Secondary – Quick Change – Plastic – Black – Holley Carburetors – Kit

Why Choose Us?



Frequently Asked Questions​

As an Authorized Automotive Retailer in the United States, we take pride in guaranteeing 100% authentic products from all brands available on our website. With partnerships spanning 1,000+ brands and a network of 20+ distributor warehouses nationwide, we maintain millions of auto parts in inventory across the USA, ensuring quick shipping and reliable service to our customers. When you shop with us, you're investing in quality and trust.
We believe we have the fastest backorder system in the U.S. auto parts industry, thanks to our strong partnerships with brands and vendors. Nearly all backordered auto parts are shipped directly by the vendors without any additional delays, or they are placed as special orders on the same day. In most cases, backordered parts are delivered within 5-10 days.
We offer unbeatable prices and the best shipping rates on auto parts, with exclusive protection and insurance included to safeguard your order from damage or loss. Enjoy convenient door-to-door delivery, real-time tracking, and our 100% satisfaction guarantee for a smooth, worry-free experience.
Our standard shipping typically takes 1-3 business days. We will provide estimated shipping time for each product. While we aim to deliver as quickly as possible, this timeframe ensures all orders are processed, prepared, and dispatched with care. If the products are not ready for shipping in 72 hours, we will refund you 100%
Absolutely. Once your order is dispatched, you’ll receive an email with tracking details, so you can follow your shipment every step of the way. Every step of shipping process will be sent through email notifications or using tracking page.
Every product page includes a stock level indicator to show what’s available. We always update the inventory 24/24. We’ll be happy to check availability and provide updates on new stock arrivals if you need a help.
We’re sorry to hear that your order wasn’t delivered in perfect condition. Please email us with your order number, a description of the issue, and photographs of the damaged item. Once we receive this information, we’ll arrange for a replacement or refund and handle the return process.
You can return items within 30 days of receipt. Ensure the product is new in its original packaging and securely wrapped for safe transit. Once we receive the item in sellable condition, we’ll issue a full refund for the product value. Contact us for the return address and further instructions.

About HOLLEY

A leader in fuel systems for over 100 years, Holley fuel management systems have powered top circle track and drag racing teams around the world. Now, Holley offers EFI systems for GM's LS engine, among many other applications. Holley's products also include performance fuel pumps, intake manifolds, and engine accessories products for street performance, race, and marine applications.

International Shipping

Below are estimated rates and delivery times for popular destinations; full carrier options are available at checkout.

Our dedicated team has years of experience managing international logistics and customs documentation to ensure smooth delivery from our US warehouse to your door. Please review our shipping policy and local import regulations before ordering.

Loading international estimates...

Reviews

There are no reviews yet.

Be the first to review “HOLLEY Quick Change Secondary Spring Kit 20-59”

Your email address will not be published. Required fields are marked *

Recently viewed products

  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    ORACLE LIGHTING TRIGGER 6 SHOOTER RF Remote Replacement 3015

    SKU: ORA3015
    Product information
    • Weight0.25 lbs
    • Dimensions6 × 2 × 1.5 in
    • Product Line

      Trigger 6 Shooter

    • Mounting Location

      Dash Mount

    • Width

      5.875 in

    • Height

      1.5 in

    • Switches Included

      Yes

    Details...
    Original price was: $91.94.Current price is: $79.95.Add to cart
    Original price was: $91.94.Current price is: $79.95.Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    MSD IGNITION Replacement Harness – 7730 Power Grid 7780

    SKU: MSD7780
    Product information
    • Weight0.985 lbs
    • Dimensions7.45 × 4.55 × 3.9 in
    • Quantity

      Each

    • Harness End 1

      Ignition Box

    • Harness End 2

      MSD Power Grid Controller

    • Harness Purpose

      Replacement Harness

    • Loom / Sleeve Included

      Yes

    Details...
    Original price was: $226.00.Current price is: $204.95.Add to cart
    Original price was: $226.00.Current price is: $204.95.
    Quantity Only 3 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    REESE Towing System Part/Component 118552

    SKU: REE118552
    Product information
    Details...
    Original price was: $97.19.Current price is: $80.99.Add to cart
    Original price was: $97.19.Current price is: $80.99.Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    RACEPAK Universal Sensor Module 230-VM-USM

    SKU: RPK230-VM-USM
    Product information
    Details...
    Original price was: $394.00.Current price is: $357.95.Add to cart
    Original price was: $394.00.Current price is: $357.95.
    Quantity Only 1 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    SKYJACKER HYDRO SHOCK W/RED BOOT H7055

    SKU: SKYH7055
    Product information
    • Weight5.45 lbs
    • Dimensions24.7 × 3.35 × 3.1 in
    • Product Line

      Hydro H7000 Series

    • Internal Design

      Twintube

    • Gas/Hydraulic

      Hydraulic

    • Compressed Length

      13.54 in

    • Extended Length

      22.75 in

    Details...
    Original price was: $58.00.Current price is: $51.87.Add to cart
    Original price was: $58.00.Current price is: $51.87.
    Quantity Only 2 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    TRANS-DAPT Carb Spring Bracket 2291

    SKU: TRA2291
    Product information
    Details...
    Original price was: $5.57.Current price is: $5.06.Add to cart
    Original price was: $5.57.Current price is: $5.06.
    Quantity Only 3 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    UMI PERFORMANCE Control Arm 6434-B

    SKU: UMI6434-B
    Product information
    • Weight17.8 lbs
    • Dimensions14 × 14 × 6 in
    • Hardware Included

      Yes

    • Material

      Steel

    • Color

      Black

    • Finish

      Powder Coat

    • Quantity

      Pair

    Details...
    Original price was: $839.99.Current price is: $699.99.Add to cart
    Original price was: $839.99.Current price is: $699.99.
    Quantity Only 1 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    HURST Console V-Matic 1298554

    SKU: HUR129-8554
    Product information
    • Weight1.2 lbs
    • Dimensions13.3 × 9.6 × 6 in
    • Quantity

      Each

    • Material

      Plastic

    • Color

      Black

    • Finish

      Natural

    • Application Specific

      Yes

    Details...
    Original price was: $99.00.Current price is: $89.75.Add to cart
    Original price was: $99.00.Current price is: $89.75.
    Quantity Only 2 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    VENTSHADE Window Ventvisor 4Pc. 94485

    SKU: VEN94485
    Product information
    • Weight2.83 lbs
    • Dimensions47 × 12 × 2 in
    • Product Line

      Original Ventvisor

    • Application Specific

      Yes

    • Front Mounting Style

      Stick-On

    • Rear Mounting Style

      Stick-On

    • In Channel / Out Of Channel

      Out of Channel

    Details...
    Original price was: $77.00.Current price is: $69.99.Add to cart
    Original price was: $77.00.Current price is: $69.99.
    Quantity Only 2 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    HUSKY LINERS Front Floor Liners 18491

    SKU: HSK18491
    Product information
    • Weight5.63 lbs
    • Dimensions33 × 23 × 4 in
    • Product Line

      WeatherBeater

    • Application Specific

      Yes

    • Textured

      Lines

    • Material

      Plastic

    • Color

      Black

    Details...
    Original price was: $85.00.Current price is: $76.49.Add to cart
    Original price was: $85.00.Current price is: $76.49.Add to wishlist

    23