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QFS 340LPH Direct Drop-In Performance Fuel Pump Assembly w/ Sending Unit, QFS-A86HV

$112.49 USD
(You save $37.50 )
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3.00 LBS

The QFS-A86HV is a direct drop-in 340LPH fuel pump assembly for 1997-2003 Chevrolet S10, GMC Sonoma, Isuzu Hombre that were originally 4.3L V6 powered (the fuel pump assemblies are different between 2.2L and 4.3L). Perfect for LSX swaps requiring additional volume beyond what the stock fuel pump can provide.Quantum's line of 340LPH direct drop-in fuel pump assemblies do away with the unreliable and problematic venturi canister design found in 1995-2005 GM trucks, vans, and SUV's. Previously, installing a high Walbro 255 or modern 340 pump into an OEM GM canister meant disabling the venturi system by cutting "windows" into the sides of the bucket. Doing so results in canister drain during hard acceleration or cornering, which leads to overheating of the fuel pump. The bandaid solution is to keep the tank at 1/4-1/2 full or above. Quantum's 340LPH assemblies resolve these deficiencies and allow the fuel pump to be upgraded while retaining OEM functionality.

Features & Benefits

  • Clean sheet canister design eliminates unreliable venturi setup, and allows tank to be run to empty
  • High Volume QFS 340LPH turbine fuel pump preinstalled, 100% gasoline and/or E85 compatiblle
  • Ethanol safe PTFE/ teflon corrugated flex hose and teflon coated wiring throughout
  • Updated 40 amp bulkhead connector to handle additional amperage load of high volume pump
  • New float arm, sending unit, tank seal, and 4-way wiring connector included
  • Lifetime Warranty

    This part fits a variety of different applications including Chevrolet, GMC, Isuzu. Please use the year make model dropdown to confirm your specific vehicle's fitment.


    This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm.  For more information go to

  • Flow:
    340 LPH
    All Quantum brand products are backed by a lifetime warranty. Quantum products that fail at any time will be replaced under warranty if it is determined that the failure was due to a defect in workmanship or material. This warranty only applies to the original customer and is non-transferable. Improper use or installation of the product voids this warranty, and Quantum is not responsible for incidental costs resulting from failure of the product. In the unlikely event that you should need to request a warranty, please contact us at with your order information and a detailed description of the problem.