Best Ls High Volume Oil Pump for Gen III and Gen IV Builds

#1 · Best Overall

1. Melling 10296 High Volume Oil Pump

Best for: Cam and valvetrain upgrades.

Why it ranks #1: Its listing covers many Gen III and IV LS families from 4.8L to 6.2L and describes increased flow for performance and upgraded-valvetrain builds.

The Melling 10296 pairs high-volume oil delivery with an explicit list of LS engine codes, enabling buyers to target camshaft upgrades and upgraded valvetrains across many Gen III and Gen IV applications. Its listed compatibility spans 4.8L through 6.2L displacements and multiple LS variants.

The pump's increased oil volume versus stock is presented for performance builds, including camshaft upgrades and high-RPM use; that makes its purpose clearer than a generic replacement listing. Compatibility names LS1, LS2, LS3, LS6, LQ4, LQ9, LR4, LM7, L59, LS4, and L33, helping narrow the application before ordering. The specified displacement range is 4.8L to 6.2L. Match both engine code and generation to the project rather than relying on displacement alone.

Skip it if you need an included front timing-cover service kit; Melling 10355HV comes with gaskets and replacement hardware.

Choose this for a listed Gen III or Gen IV LS code when a cam or valvetrain upgrade calls for increased oil volume. Confirm the engine code and application details; the supplied listing does not specify installation hardware.

Listed on Amazon as: Melling 10296 High Volume LS Oil Pump | Fits LS1 LS2 LS3 LS6 LQ4 LQ9 LR4 LM7 L59 LS4 L33 4.8L 5.3L 5.7L 6.0L 6.2L Gen III IV LS Engines | OEM Replacement

#2 · Broad LS Fit

2. Melling M295HV Oil Pump

Best for: High-demand Gen III/IV LS builds.

Why it ranks #2: This high-volume pump is listed for Gen 3 and Gen 4 engines from 4.8L to 6.2L, with flow and lubrication stability aimed at demanding use.

The Melling M295HV increases oil flow over standard pumps, giving Gen III and Gen IV LS engines an oiling option for higher-demand, performance-oriented setups. Its listed range covers 4.8L through 6.2L engines, while improved lubrication stability is intended to help maintain pressure at high RPM and under heavy load.

This pump's high-volume design addresses applications that need more oil flow than a standard pump, while its stated pressure stability targets critical components during high-RPM, heavy-load operation. The 4.8L-to-6.2L range makes it relevant across several LS displacements, but the listing does not provide a vehicle-by-vehicle fit chart. Precision Melling engineering and tight tolerances are cited for consistent delivery and service life; buyers should match the M295HV designation and engine generation to their build before installation.

Skip it if you need a vehicle-specific compatibility list; A-Premium APOIP052 supplies an extensive named-vehicle fitment list.

This suits builders of Gen III or Gen IV LS engines from 4.8L to 6.2L who need increased flow for higher-demand operation. Its listing is engine-range focused, so verify the exact application before choosing it.

Listed on Amazon as: Melling M295HV High Volume LS Oil Pump | Fits Gen 3 Gen 4 LS Engines | 4.8L 5.3L 5.7L 6.0L 6.2L | Increased Oil Flow Performance Pump

#3 · Flow and Pressure

3. JEGS 23517 Oil Pump

• Weight: 2.73 lb

Best for: Quantified LS pump upgrades.

Why it ranks #3: The listing gives specific increases of 18% higher volume and 10% higher pressure for 1998–2012 GM LS1, LS3 and LS6 applications.

JEGS states an 18% higher oil volume and 10% higher pressure for the 23517, giving LS1, LS3, and LS6 owners concrete output comparisons for an upgrade decision. Its listed 1998–2012 application span makes the intended engine family and model-year window explicit.

The stated 18% volume increase and 10% pressure increase give buyers defined performance differences to weigh against a standard pump. Compatibility is listed for 1998–2012 GM LS1, LS3, and LS6 engines, which narrows the intended range rather than implying fit across every LS variant. An optional shim washer is mentioned, but the listing does not clarify its installation conditions. Check that the engine code and year fall within the stated scope before planning the pump service.

Skip it if you have a different listed LS code; Melling 10296 names LS2, LS6, and several truck-engine variants.

Choose this when the engine is an LS1, LS3, or LS6 within the stated years and quantified volume and pressure changes matter. Its compatibility list is narrower than broad LS coverage, so check engine code first.

Listed on Amazon as: JEGS 23517 Oil Pump GM LS High Volume High Pressure

#4 · AFM/DOD Focus

4. Melling 10355HV Oil Pump Kit

Best for: Gen IV AFM/DOD service work.

Why it ranks #4: It targets Gen IV 5.3L, 6.0L and 6.2L AFM/DOD engines and includes a front cover gasket, crank seal, crank bolt and water pump gaskets.

The Melling 10355HV combines high-volume, high-pressure output with a front timing cover gasket install kit, enabling Gen IV LS AFM/DOD service with replacement sealing parts on hand. It is listed for 5.3L, 6.0L, and 6.2L engines and targets lifter oiling demands.

Its increased flow and pressure are specifically tied to AFM/DOD lifter oiling demands and idle-pressure stability, giving the pump a clear Gen IV use case. The included front timing cover gasket, crank seal gasket, new crank bolt, and water-pump gaskets can support the related service workflow by bundling listed sealing parts and replacement hardware. Compatibility is stated for 5.3L, 6.0L, and 6.2L Gen IV LS engines; match those boundaries to the vehicle before installation.

Skip it if you need a pump for a 4.8L LS; Chevrolet GMP12710303 lists a broader range beginning at 4.8L, subject to its wet-sump limits.

This is aimed at Gen IV LS owners servicing AFM/DOD engines who want the pump and listed front-cover sealing parts together. Its stated fit is limited to 5.3L, 6.0L, and 6.2L applications, so verify the engine.

Listed on Amazon as: Melling 10355HV High-Volume High-Pressure Oil Pump with Front Timing Cover Gasket Install Kit | FIts Gen IV LS AFM/DOD Engines 5.3L 6.0L 6.2L | Improved Oil Pressure & Reliability

#5

5. Moroso 22120 Oil Pump

• Weight: 2.6 lb

Best for: Wet-sump LS installations.

Why it ranks #5: This wet-sump LS pump is specified for Gen III and Gen IV 4.8L, 5.3L, 6.0L and 6.2L engines, a useful defined fit range.

Moroso identifies the 22120 as a high-volume wet-sump pump for Gen III and Gen IV LS engines, enabling a clear application screen before purchase. Its supplied engine range includes 4.8L, 5.3L, 6.0L, and 6.2L, with U.S. manufacture also stated.

The wet-sump designation matters when narrowing the installation: this listing names that system type rather than presenting the pump as universal. Its Gen III/IV compatibility and four stated displacements provide a practical engine-range check, though no flow-rate or pressure-change figure is supplied. Moroso gives a 5 x 6 x 8 inch product size and 2.6-pound weight, useful details for handling and planning parts storage, but not a substitute for confirming the specific build application.

Skip it if you need stated flow and pressure gains; JEGS 23517 lists both volume and pressure increases.

Consider this Moroso pump for a wet-sump Gen III or Gen IV LS build in one of its listed displacements. The supplied details do not quantify output, so buyers prioritizing measured flow or pressure figures should compare alternatives.

Listed on Amazon as: Moroso 22120 LS High Volume Wet Sump Oil Pump 10296

#6

6. Melling M365HV Oil Pump

• Weight: 2.14 lb

Best for: Melling M365HV part seekers.

Why it ranks #6: Its title identifies it as a Melling high-volume LS pump and lists several GM vehicle applications, but the supplied details give little flow or engine-range information.

The Melling M365HV is identified by model and by a set of named vehicle applications, enabling buyers already searching for this specific high-volume pump to narrow their selection. Its title cites Sierra, Escalade, Lacrosse, Avalanche, CTS, and Rainier, while the supplied specifications identify Melling as the brand.

The M365HV model designation is the clearest selection detail here, and the title associates it with several vehicle families rather than providing an engine-by-engine explanation. That can help a buyer compare a known part reference with an existing repair or build plan. The supplied information gives package dimensions and weight but no flow-rate, pressure, engine-generation, or included-hardware details. Treat this as a narrowly documented option and use the exact M365HV reference when checking the intended application.

Skip it if you need explicit engine codes and flow details; Melling 10296 lists compatible LS codes and its high-volume purpose.

This fits shoppers who already have the M365HV reference and see their vehicle family named in the title. Because engine coverage and output figures are not supplied, use the model designation as a starting point, not a complete fitment check.

Listed on Amazon as: Melling M365HV Hi Volume Oil Pump fits LS Various Sierra Escalade Lacross Avalanche CTS Rainier

#7

7. A-Premium High Volume Oil Pump

• Weight: 2.86 lb

Best for: Vehicle-list fitment shoppers.

Why it ranks #7: It is explicitly a high-volume pump for 4.8L to 6.2L LS engines and provides extensive vehicle fitment examples, though no flow increase is stated.

A-Premium APOIP052 stands out for its extensive named-vehicle fitment information, enabling owners to check many GM and related applications against a specific listing. It is identified as a high-volume pump for LS 4.8L, 5.3L, 5.7L, 6.0L, and 6.2L engines.

The fitment section names applications across Chevrolet, Cadillac, Buick, and Avanti, with examples including Silverado, Camaro, Corvette, Escalade, and Rainier. That breadth can help a buyer begin a vehicle-based compatibility check instead of selecting solely by displacement. The title specifies several LS engine sizes, while the supplied details do not state a flow increase, pressure change, or included installation items. Use the named vehicle and year entries to narrow the match before ordering.

Skip it if you need quantified flow or pressure gains; JEGS 23517 specifies 18% higher volume and 10% higher pressure.

This is a sensible starting point for owners using its long vehicle list to check an LS pump application. Its listed fitment deserves attention, but buyers seeking documented flow or pressure changes should look elsewhere.

Listed on Amazon as: A-Premium High Volume Oil Pump for LS 4.8L 5.3L 5.7L 6.0L 6.2L

#8

8. Mizumo Auto High Volume Oil Pump

• Weight: 5 lb

Best for: High-stress LS lubrication needs.

Why it ranks #8: It claims 18% higher volume and lists 4.8L, 5.7L and 6.0L LS applications, but the supplied fit range is narrower than leading options.

Mizumo Auto specifies an 18% high-volume pump made from high-strength metal alloys, enabling an oiling upgrade aimed at high-RPM and high-stress operation. Its title names Chevrolet GM 4.8L, 5.7L, and 6.0L applications and the LS1, LS2, and LS3 engine codes.

The stated 18% volume increase is paired with alloy construction described for extreme temperatures and high RPM, connecting the output claim to demanding operating conditions. Mizumo also says the pump meets or exceeds OEM specifications for precise fitment across various engines, which is relevant to replacement planning. The listed applications are narrower in the title than the broad description; use the named engine codes and sizes as the initial screen, since no detailed vehicle-by-vehicle chart is supplied.

Skip it if you need a broader named LS engine-code list; Melling 10296 includes LS1, LS2, LS3, LS6, and truck-engine variants.

This suits LS1, LS2, or LS3 owners seeking increased volume for high-RPM or high-stress use. Its title names only three displacement sizes, so buyers with other applications should use a pump listing with broader explicit coverage.

Listed on Amazon as: MA-9761260759 18% High Volume Oil Pump Compatible with Chevrolet GM 4.8 5.7 6.0L LS1 LS2 LS3 M295HV

#9

9. Chevrolet Performance LS Oil Pump

Best for: Wet-sump Chevrolet LS builds.

Why it ranks #9: It fits many wet-sump LS applications from 4.8L to 7.0L, but is described as a stock pickup pump and excludes dry-sump applications.

Chevrolet's GMP12710303 specifies wet-sump applications and explicitly rules out dry-sump use, enabling buyers to screen the oiling-system layout before selecting a pump. The listed range reaches 4.8L to 7.0L, and an oil-pump pickup tube seal is included.

The wet-sump-only restriction is central to fit: the listing says it will not work with dry-sump applications such as LS7 or LS9. Its 4.8L-to-7.0L range and references to LS1, LS2, LS3, and LS6 provide additional application context, while the description cites stock GM pickup applications from 1999–2013 without VVT and/or Displacement on Demand. The included pickup-tube seal supports that service detail; check the engine's equipment and sump type carefully.

Skip it if you have a dry-sump LS7 or LS9; Moroso 22120 is listed for wet-sump use, so this Chevrolet pump is not suitable.

This is for buyers with a compatible wet-sump Chevrolet LS application who value the included pickup-tube seal. Do not select it for dry-sump LS7 or LS9 engines, and check the listed VVT and displacement-management caveat.

Listed on Amazon as: Chevrolet Performance GMP12710303 LS Series 4.8L – 7.0L High Volume Engines Oil Pump

#10

10. Part Synergy LS Oil Pump

• Weight: 2.6 lb

Best for: Direct-fit OE replacement buyers.

Why it ranks #10: Although labeled a hi-volume LS pump for 4.8L–7.0L engines, its OE-replacement description emphasizes factory specifications rather than an increased-flow performance claim.

Part Synergy describes this hi-volume LS pump as a direct OE replacement requiring no modifications, enabling a factory-style replacement workflow for compatible GM applications. The stated engine range is 4.8L to 7.0L, and its listing associates it with Chevrolet Performance part number GMP12710303.

The direct-fit claim and factory-specification language point to buyers restoring an original-style installation rather than adapting a pump with modifications. Quality testing and a secure fit for daily use and high-stress driving are also stated, offering context for intended operation. Its 4.8L-to-7.0L LS range is broad, but the supplied details do not name individual engine codes or wet- versus dry-sump limits. Use the part-number reference and confirm application specifics before installation.

Skip it if you need an explicit wet-sump-only rule and dry-sump exclusions; Chevrolet GMP12710303 provides those application boundaries.

This suits a buyer seeking a direct-fit OE-style replacement for a compatible LS application, including daily or high-stress use. The broad displacement range is not a complete fitment guide, so verify engine code and sump type.

Listed on Amazon as: Oil Pump – Hi-Volume LS 4.8L-7.0L | Engine Oil Pump | OE Replacement | Compatible with Various GM Applications – Each