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| Feature | BuyAutoParts 40-30796AN Cummins 6BT 5.9L Holset HX35 Replacement Turbocharger | Upgrade Turbocharger Billet Impeller Replacement for Holset Cummins Various I… |
|---|---|---|
| Year Coverage | INDUSTRIAL GENSET | — |
| Warranty | 12-month unlimited | — |
| Core Charge | None required | — |
| See the Listing | See the Listing |
Different Cummins Engines, Different SKU Classes
Both products serve Cummins engine families but on completely different displacements (5.9L vs 15L), different applications (industrial vs Class-8), and different SKU classes (complete turbo vs wheel-only).
The 40-30796AN industrial-only fence:
40-30796AN: Industrial Cummins 6BT HX35
The 40-30796AN is the BuyAutoParts industrial-only complete-turbo replacement on the Cummins 6BT 5.9L Holset HX35 frame for fixed-mount applications.
The OE cross-reference:
Weonefit Upgrade: Cummins ISX15 Billet Impeller
The Weonefit Upgrade is a billet (CNC-machined) compressor wheel replacement for the Holset HE400VG and HE451VE turbochargers on the 2005-onward Cummins ISX15 chassis. The wheel-only SKU class requires turbo teardown and re-assembly at the rebuilder shop.
The Weonefit OE cross-reference:
The Weonefit warranty framing:
Installer Context Across The Two Sides
The labor envelopes on these two SKUs are also different. The 40-30796AN is a complete-turbo replacement that bolts up to the existing industrial Cummins 6BT manifold and downpipe in a few hours of fixed-mount work. The Weonefit Upgrade billet impeller requires turbo teardown, wheel balancing, and re-assembly — typically a full shop day at a rebuilder shop with the bench balancing equipment.
For an industrial generator-set technician comfortable with the bolt-up-and-go install pattern on fixed-mount Cummins 6BT applications, the 40-30796AN entry-tier complete-turbo path is structurally easier than the rebuilder-shop wheel-only path. For a Class-8 fleet rebuilder shop with the ISX15 turbo bench balancing setup already in service, the Weonefit Upgrade wheel-only path preserves the existing HE400VG / HE451VE housings and the existing center cartridge — saving substantially on the housing-replacement cost when those parts pass inspection. The cross-shop choice is shaped by labor-side capability as much as by engine family.
Rebuilder-Tier Context
Neither pick sits at the rebuilder-tier institutional-quality top of its respective Cummins segment.
The 40-30796AN sits at the entry tier on the industrial Cummins 6BT side. Rebuilder-tier alternatives include Industrial Injection Cummins specialty, BD Diesel industrial-spec HX35 replacements, and the Cummins reman OEM HX35 program — all carry longer institutional warranty depth than the BuyAutoParts entry tier. For industrial generator-set applications running 24/7 service, the rebuilder-tier institutional density is the documented choice.
The Weonefit Upgrade billet impeller sits at the entry tier on the Cummins ISX15 wheel-only side. Rebuilder-tier alternatives include Industrial Injection ISX15 specialty units, ATS Diesel Performance ISX15 turbo upgrades, and the Cummins reman OEM HE400VG / HE451VE complete-turbo programs at the high-four-figure tier. The Weonefit Upgrade is the entry-tier wheel-only path when the existing housings pass inspection at the Class-8 rebuilder shop.
If You\'re Coming From The Industrial 6BT Side
If you landed on the 40-30796AN listing first, the Weonefit Upgrade billet impeller is not the cross-shop on your industrial application. The Weonefit Upgrade is a Cummins ISX15 part — different engine size, different chassis class, different SKU class. The relevant industrial Cummins 6BT cross-shop is the rebuilder-tier Industrial Injection / BD Diesel industrial-spec HX35 alternatives, or the Cummins reman OEM HX35 program. For 24/7 industrial generator-set service, the rebuilder-tier institutional warranty depth justifies the spend; for occasional-use marine main applications, the BuyAutoParts entry tier handles the routine failure envelope.
If You\'re Coming From The Cummins ISX15 Side
If you landed on the Weonefit Upgrade listing first, the 40-30796AN is not the cross-shop on your chassis. The 40-30796AN is a Cummins 6BT 5.9L industrial part with explicit Dodge Ram pickup exclusion — and the ISX15 chassis is not a Cummins 6BT application either. The relevant Cummins ISX15 cross-shop runs through the rebuilder-tier Industrial Injection ISX15 specialty units, the ATS Diesel Performance ISX15 turbo upgrades, or the Cummins reman OEM HE400VG / HE451VE complete-turbo programs at the high-four-figure tier. For Class-8 over-the-road fleet operators where downtime cost dwarfs parts spend, the rebuilder-tier institutional density on either Cummins engine family is the documented choice; the Weonefit Upgrade entry-tier wheel-only path remains the cost-saving alternative when the existing housings pass inspection.
For underlying turbocharger engineering background, the Wikipedia turbocharger reference documents the compressor-and-turbine architecture both kits implement. The TSReman Turbo University service-part catalog publishes the Holset HX35 and HE400VG / HE451VE cross-reference manifests. The Rotomaster understanding turbochargers reference covers the rebuilder-tier diagnostic protocol fleet operators should run before ordering either kit.
Verdict: Cummins Engine + Application Selects The Part
No head-to-head winner. Different Cummins engine sizes, applications, and SKU classes. Pick by the engine and application on the failed equipment.
Pick the 40-30796AN for an industrial Cummins 6BT 5.9L application on the Holset HX35 chain. Pick the Weonefit Upgrade billet impeller for a Class-8 Cummins ISX15 chassis with a rebuilder shop ready to tear down the existing HE400VG / HE451VE turbo for compressor wheel replacement. Cross-stock both for fleet operators running both engine families.
Class-8 Cummins ISX15 wheel-only path:
Check Price on AmazonCummins Cross-Cohort Decision Questions
- Are these two parts cross-shoppable on the same vehicle?
- No. The 40-30796AN is the BuyAutoParts complete-turbo replacement for the Cummins 6BT 5.9L industrial engine on the Holset HX35 frame; the Weonefit Upgrade billet impeller is a compressor wheel-only replacement for the Cummins ISX15 15-liter Class-8 truck turbocharger (HE400VG / HE451VE frame). Different Cummins engine displacements (5.9L vs 15L), different applications (industrial fixed-mount vs Class-8 over-the-road), different turbo frames, different SKU classes (complete turbo vs wheel-only).
- Why does the 40-30796AN exclude Dodge Ram pickups?
- The 40-30796AN is for the industrial Cummins 6BT engine on fixed-mount applications (industrial generators, marine main, fleet stationary equipment). The Dodge Ram pickup chassis Cummins 6BT uses a different Holset HX35 variant with chassis-specific exhaust manifold and downpipe geometry. The exclusion is explicit on the listing. For Dodge Ram pickup owners with the 5.9L Cummins, the rebuilder-tier Fleece Performance Cheetah HX35 (1994-2002 Ram chassis) or BD Diesel Stock-Replacement HX35 are the cross-shop alternatives — not the 40-30796AN industrial-only SKU.
- What does "billet impeller replacement" actually mean on the Weonefit side?
- The Weonefit Upgrade product replaces just the compressor wheel inside the Cummins ISX15 turbocharger, not the complete turbo. The rebuilder reuses the existing Holset HE400VG / HE451VE housings, center cartridge, and wastegate actuator while installing the new billet (CNC-machined from solid metal stock) compressor wheel. This requires turbo teardown, wheel balancing, and re-assembly — shop work the bolt-up-and-go 40-30796AN complete-turbo replacement does not require on the industrial 6BT side.
- Are both Cummins applications heavy-duty?
- Yes, but on different engine sizes and different chassis classes. The 40-30796AN serves industrial Cummins 6BT 5.9L applications (industrial generators, marine main propulsion, fleet stationary equipment). The Weonefit Upgrade billet impeller serves the Cummins ISX15 15-liter Class-8 over-the-road truck market (Kenworth, Peterbilt, Freightliner, International chassis). Three times the engine displacement and a completely different chassis class. Fleet operators running both engine families would stock both parts; single-engine fleets only need the part matching their chassis.
Use our Turbo Replacement Cost Estimator to size aftermarket spend on either Cummins engine family. For the broader heavy-duty diesel turbocharger context, route to the cross-engine turbocharger roundup.