Description

Diaphragm Cover – Secondary – Quick Change – Plastic – Black – Dual 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 Sec Spring 20-73”

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

    POWERMASTER Battery Terminal Boot 100

    SKU: PWM100
    Product information
    • Weight0.075 lbs
    • Dimensions3.8 × 3.3 × 1.4 in
    • Material

      Rubber

    • Color

      Red

    • Finish

      Natural

    • Quantity

      Each

    • Component Cover

      Battery

    Details...
    Original price was: $9.92.Current price is: $9.02.Add to cart
    Original price was: $9.92.Current price is: $9.02.
    Quantity Only 6 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    MSD IGNITION Replacement Shaft ASY15547

    SKU: MSDASY15547
    Product information
    • Weight0.84 lbs
    • Dimensions12.15 × 3.05 × 2.1 in
    • Quantity

      Each

    • Outside Diameter

      0.500 in

    • Length

      12 in

    • Material

      Chromoly

    • Color

      Black

    Details...
    Original price was: $135.62.Current price is: $123.29.Add to cart
    Original price was: $135.62.Current price is: $123.29.
    Quantity Only 9 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    RACING ELECTRONICS Inline Push To Talk Switch RT3800

    SKU: RCERT3800
    Product information
    • Weight0.31 lbs
    • Dimensions6.25 × 5.6 × 2.35 in
    • Quantity

      Each

    • Mounting Style

      Clip On

    • Components Type

      Switch

    • Input Jack 1 End

      5 Pin

    • Input Jack 1 Style

      Male

    Details...
    Original price was: $169.26.Current price is: $153.87.Add to cart
    Original price was: $169.26.Current price is: $153.87.
    Quantity Only 3 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    MOOG Bushing Kit K5196

    SKU: MOGK5196
    Product information
    • Weight0.485 lbs
    • Dimensions4.3 × 3.35 × 1.8 in
    • Quantity

      Pair

    • Upper / Lower Position

      Upper

    • Outside Diameter

      1.39 in

    • Underhead Length

      1.73 in

    • Hole Diameter

      0.67 in

    Details...
    Original price was: $13.54.Current price is: $12.31.Add to cart
    Original price was: $13.54.Current price is: $12.31.Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    SHIFNOID Engine Lean Out Kit PC3000

    SKU: SHFPC3000
    Product information
    • Weight1.35 lbs
    • Dimensions12.1 × 9.4 × 3.7 in
    • Quantity

      Kit

    • Fittings Included

      Yes

    • Fitting A End 1 Size

      3/8 NPT

    • Fitting A End 1 Style

      Male

    • Intended Purpose

      Lean Out Valve kit

    Details...
    Original price was: $79.96.Current price is: $72.69.Add to cart
    Original price was: $79.96.Current price is: $72.69.Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    STILO Drinking System Kit for Side Mount YA0600

    SKU: STIYA0600
    Product information
    Details...
    Original price was: $50.00.Current price is: $45.10.Add to cart
    Original price was: $50.00.Current price is: $45.10.
    Quantity Only 3 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    TRANS-DAPT Relocation Kit 1220

    SKU: TRA1220
    Product information
    • Weight4.2 lbs
    • Dimensions12.05 × 8.6 × 4 in
    • Remote Filter Mounting Location

      Flat Mount

    • Oil Filter Mount Single / Dual Filter

      Dual

    • Oil Filter Adapter Included

      Yes

    • Oil Filter Thread 1

      13/16-16 in

    • Inlet Quantity

      2.0

    Details...
    Original price was: $151.00.Current price is: $137.27.Add to cart
    Original price was: $151.00.Current price is: $137.27.
    Quantity Only 6 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 18411

    SKU: HSK18411
    Product information
    • Weight7.23 lbs
    • Dimensions33 × 23 × 4.5 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.
    Quantity Only 3 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    HOLLEY Temperature Sensor 534-2

    SKU: HLY534-2
    Product information
    • Weight0.125 lbs
    • Dimensions5 × 3.45 × 1.15 in
    • Quantity

      Each

    • Material

      Brass

    • Color

      Natural

    • Finish

      Natural

    • Sender Type

      Water Temperature

    Details...
    Original price was: $45.00.Current price is: $40.49.Add to cart
    Original price was: $45.00.Current price is: $40.49.
    Quantity Only 2 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    GRANT Quick Release Hub 3002

    SKU: GRT3002
    Product information
    • Weight0.7 lbs
    • Dimensions5.2 × 4.7 × 2 in
    • Quantity

      Kit

    • Variant

      Yes

    • Material

      Steel

    • Color

      Natural

    • Finish

      Natural

    Details...
    Original price was: $137.89.Current price is: $125.35.Add to cart
    Original price was: $137.89.Current price is: $125.35.
    Quantity Only 1 left in stock!
    -+
    Add to cart
    Add to wishlist

    27