8 Fairfax St SE
NAPA Auto Parts Genuine Parts Company
8 Fairfax St SE
Leesburg,  VA  20175
(703) 777-2055
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Store Hours
Mon-Fri:7:30 AM-7:00 PM
Sat:8:00 AM-5:00 PM
Sun:9:00 AM-5:00 PM
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Shock Absorber - Reflex - Rear
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Shock Absorber - Reflex - Rear

Part #: NS 911334
Line: NAPA Shocks and Struts

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Features & Benefits

Warranty: Standard : Limited Lifetime, Replacement Will Be Issued for Unit that Proves Defective During Normal Use on the Vehicle on Which It Was Originally Installed. Extended Only to the Owner of the Vehicle on Which the Unit is Installed-Not Transferable.


The NAPA Reflex Truck Shock Absorber w/ The Patented ASD Technology Combines Specially Tuned Valving w/ A Fluon Banded Piston. The ASD Valve Has The Ability To Sense Acceleration To Improve The Handling, Safety, & Overall Ride Characteristics.

  • Impact Sensor Technology: Innovative Valving Provides Greater Control For Handling, While Improving Ride Comfort.
  • All Weather Fluid: Contains Special Modifiers To Reduce Friction & Ensure Smooth Rod Reaction.
  • Fluon Banded Piston: The Fluon Band Provides Consistent Sealing Between The Piston & Pressure Tube Which Delivers Better Control & Increased Durability.
  • Full Displaced Valving: Tuned Specifically For Each Application, This Valving Automatically Adjusts To Road Extremes To Provide Consistency & Ride
  • Nitrogen Gas Charged: For Improved Ride & Handling, Helps Maintain Tire To Road Contact By Reducing Aeration - On Most Applications
  • 2-1/4" Or 2" Diameter Reserve Tube: Allows More Fluid Carrying Capacity For A Cooler Running Unit
  • 1-3/8" Bore: Lower Operating Pressure Than Standard 1" Bore Units.
  • 5/8" Piston Rod: Heavy-Duty Nitrocarburized Rod For Long Service Life. On Non-Dust Shield Units Only.
  • Special Seal: "Self-Lubricating" Fluid Seal Designed To Retain Gas w/o Excessive Wear Or Friction


Shock Compressed Length 17.28 in.
Gas Charged Yes
Shock Parts Pack Part # None
Sub Brand Reflex
VMRS Code 016-008-003
Lower Mount LS39
Quality Level Better
Design Twin Tube
Lower Mounting Isolator Included No
Air Bladder N/A
Extended Length 28.78 in
Shock Dust Shield Yes
Air Adjustable N/A
Shock Travel Length 11.5 in.
Stroke Length 11.5 in
SDS Required Yes
Shock Extended Length 28.78 in.
Boot Included No
Compressed Length 17.28 in
Lower Mount Type Eyelet
Bearing Plate Included No
Air Ride Suspension N/A
Manufacturer Part Number 911334
Adjustable N/A
Coil Over Springs Included No
Upper Mount Type Eyelet
Brand NAPA
Upper Mount LS39
Contains VOCs No
Dust Shield Yes
Upper Mounting Isolator Included No

Safety Information

Vehicle Fitment Guide

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