Description

Rocker Arm Nut – Race Series Polylock – 3/8-24 in Thread – Steel – Black Oxide – Set of 4

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 SCORPION PERFORMANCE

Using the experience and knowledge gained from years of racing success, Scorpion produces rocker arms, lifters, pushrods, valves, valve springs, valvetrain stabilizers (stud girdles), fuel rail kits, lubricants, and more.

Reviews

There are no reviews yet.

Be the first to review “SCORPION PERFORMANCE Poly Locks – 3/8 (4pk) PL38-4”

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

    PROTHANE 05-10 LX Platform Differ ential Kit Bushings 4-1607-BL

    SKU: PTN4-1607BL
    Product information
    • Weight1.8 lbs
    • Dimensions6.3 × 6.2 × 4.1 in
    • Quantity

      Kit

    • Inner Sleeve Included

      Yes

    • Bushing Material

      Polyurethane

    • Bushing Color

      Black

    • Bushing Finish

      Natural

    Details...
    Original price was: $44.61.Current price is: $40.55.Add to cart
    Original price was: $44.61.Current price is: $40.55.Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    NGK Spark Plug 3830 BR10EG

    SKU: NGKBR10EG
    Product information
    • Weight0.13 lbs
    • Dimensions3.4 × 0.9 × 0.8 in
    • Product Line

      NGK Standard

    • Plug Length

      Standard

    • Core Type

      Resistor

    • Heat Range

      10

    • Core Material

      Copper

    Details...
    Original price was: $7.23.Current price is: $6.57.Add to cart
    Original price was: $7.23.Current price is: $6.57.Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    MSD IGNITION Large Cap Spacer 8120

    SKU: MSD8120
    Product information
    Details...
    Original price was: $127.00.Current price is: $114.95.Add to cart
    Original price was: $127.00.Current price is: $114.95.
    Quantity Only 1 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    MARCH PERFORMANCE Bracket Kit SBC Outside Mount 20450

    SKU: MPP20450
    Product information
    • Weight12.65 lbs
    • Dimensions12.25 × 10.5 × 10.25 in
    • Quantity

      Kit

    • Hardware Included

      Yes

    • Water Pump Pulley Included

      Yes

    • Water Pump Pulley Groves/Ribs

      6 Rib

    • Water Pump Pulley Material

      Aluminum

    Details...
    Original price was: $794.39.Current price is: $661.99.Add to cart
    Original price was: $794.39.Current price is: $661.99.Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    SAFETY SYSTEMS Fire Suppression System 2.5lb Manual Pull PRC-250-N

    SKU: SAFPRC-250-N
    Product information
    • Weight5.43 lbs
    • Dimensions18 × 6.5 × 6 in
    • Quantity

      Kit

    • Product Line

      Fire Bottle

    • Nozzles Included

      Yes

    • Nozzle Style

      Straight

    • Fire Agent

      Novec 1230

    Details...
    Original price was: $476.30.Current price is: $433.00.Add to cart
    Original price was: $476.30.Current price is: $433.00.
    Quantity Only 1 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    SKYJACKER Black Max Shock W/Black Boot B8517

    SKU: SKYB8517
    Product information
    • Weight6.253 lbs
    • Dimensions24.25 × 3.5 × 3.5 in
    • Product Line

      Black MAX

    • Internal Design

      Twintube

    • Gas/Hydraulic

      Hydraulic

    • Compressed Length

      15.94 in

    • Extended Length

      27.07 in

    Details...
    Original price was: $70.00.Current price is: $62.91.Add to cart
    Original price was: $70.00.Current price is: $62.91.
    Quantity Only 4 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 H7051

    SKU: SKYH7051
    Product information
    • Weight5.42 lbs
    • Dimensions24.55 × 3.4 × 3.1 in
    • Product Line

      Hydro H7000 Series

    • Internal Design

      Twintube

    • Gas/Hydraulic

      Hydraulic

    • Compressed Length

      13.71 in

    • Extended Length

      22.58 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 6 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    JMS TractionMax – Traction Control Device Plug&Play TX0510F

    SKU: JMSTX0510F
    Product information
    • Weight0.9 lbs
    • Dimensions8.6 × 6.2 × 2.6 in
    • Product Line

      TractionMAX

    • Wiring Harness Included

      Yes

    • Quantity

      Each

    • Traction Lockout

      Yes

    • On-The-Fly Tuning

      Yes

    Details...
    Original price was: $494.73.Current price is: $449.75.Add to cart
    Original price was: $494.73.Current price is: $449.75.
    Quantity Only 2 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    U-B MACHINE Caliper Bracket Dynalite -543875

    SKU: UBM12-0410
    Product information
    • Weight0.785 lbs
    • Dimensions7.5 × 4.85 × 0.75 in
    • Material

      Steel

    • Color

      Natural

    • Finish

      Natural

    • Quantity

      Each

    • Driver / Passenger Side

      Driver, Passenger

    Details...
    Original price was: $18.49.Current price is: $16.81.Add to cart
    Original price was: $18.49.Current price is: $16.81.
    Quantity Only 4 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    HURST Shifter Stick Only 5384331

    SKU: HUR538-4331
    Product information
    • Weight1.655 lbs
    • Dimensions19.8 × 7.85 × 0.5 in
    • Product Line

      Competition Plus

    • Knob Thread

      3/8-16 in

    • Quantity

      Each

    • Material

      Steel

    • Color

      Chrome

    Details...
    Original price was: $194.00.Current price is: $175.95.Add to cart
    Original price was: $194.00.Current price is: $175.95.Add to wishlist

    31