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| Feature | BuyAutoParts 40-30314AN Volvo D12 Diesel Holset HX52 Replacement Turbocharger | Upgrade Turbocharger Billet Impeller Replacement for Holset Cummins Various I… |
|---|---|---|
| Year Coverage | CLASS-8 SLEEPER | — |
| Warranty | 12-month unlimited | — |
| Core Charge | None required | — |
| See the Listing | See the Listing |
Different Class-8 Engine Families, Different SKU Classes
The structural asymmetry on this cross-shop is the engine family and the SKU class. Both products serve Class-8 heavy-duty truck applications, but the engines and parts are different.
The 40-30314AN fits the Volvo D12 12-liter chassis:
The Weonefit Upgrade fits the Cummins ISX15 15-liter chassis:
40-30314AN: Class-8 Volvo D12 Complete Turbo
The 40-30314AN is the BuyAutoParts complete-turbo replacement on the Class-8 Volvo D12 chassis. The OE chain runs through the Volvo 3599996 / 3599996-D / 20516147 part numbers across the 1995-2009 D12 production run.
The BuyAutoParts warranty term:
Weonefit Upgrade: Cummins ISX15 Billet Impeller Only
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:
Rebuilder-Tier Context
Neither the 40-30314AN nor the Weonefit Upgrade billet impeller sits at the rebuilder-tier institutional-quality top of its respective Class-8 segment.
The 40-30314AN sits at the entry tier on the Class-8 Volvo D12 side. The rebuilder-tier alternatives include Industrial Injection (Class-8 Volvo specialty), ATS Diesel Performance, and KC Turbos premium — all carry longer institutional warranty depth than the BuyAutoParts entry tier. For high-mileage Volvo D12 chassis above 600,000 miles where the casting fatigue curve has progressed past entry-tier coverage envelope, the rebuilder-tier institutional units carry the documented production-history warranty depth that fleet operators evaluate against the downtime cost on the Volvo VNL / VNR / VHD chassis.
The Weonefit Upgrade billet impeller sits at the entry tier on the Cummins ISX15 wheel-only side. The 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. Neither product matches the institutional production history of those rebuilder-tier specialty Class-8 alternatives.
If You\'re Coming From The Volvo D12 Side
If you landed on the 40-30314AN listing first, the Weonefit Upgrade billet impeller is not the cross-shop on your chassis. The Weonefit Upgrade is a Cummins ISX15 part — different engine family, different chassis. The relevant Volvo D12 cross-shop is the rebuilder-tier Industrial Injection / ATS Diesel Performance Class-8 alternatives, or the broader BuyAutoParts heavy-duty diesel line including the 40-30796AN Cummins 6BT industrial HX35.
If You\'re Coming From The Cummins ISX15 Side
If you landed on the Weonefit Upgrade listing first, the 40-30314AN is not the cross-shop on your chassis. The 40-30314AN is a Volvo D12 12-liter Class-8 part — different engine displacement, different turbo frame family. The relevant Cummins ISX15 cross-shop runs through the rebuilder-tier Industrial Injection ISX15 specialty units or the Cummins reman OEM HE400VG / HE451VE 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 rebuilder shop.
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 HX52 and HE400VG / HE451VE cross-reference manifests cited by both listings. The Rotomaster understanding turbochargers reference covers the rebuilder-tier diagnostic protocol Class-8 fleet operators should run against the failed turbo before ordering either kit.
Verdict: Class-8 Engine Selects The Part
No head-to-head winner. Both Class-8 heavy-duty applications, but different engine families and different SKU classes. Pick by which engine has the failure on your chassis.
Pick the 40-30314AN for a Class-8 Volvo VNL / VNR / VHD with the D12 12-liter engine. Pick the Weonefit Upgrade billet impeller for a Class-8 Kenworth / Peterbilt / Freightliner / International with the 2005-onward Cummins ISX15 15-liter engine and a rebuilder shop ready to tear down the existing HE400VG / HE451VE turbocharger for compressor wheel replacement. Cross-stock both for fleet operators running both engine families. Neither pick matches rebuilder-tier institutional density on its respective engine.
Class-8 Cummins ISX15 compressor-wheel-only path:
Check Price on AmazonClass-8 Heavy-Duty Cross-Cohort Questions
- Are these two parts cross-shoppable on the same vehicle?
- No. The BuyAutoParts 40-30314AN is the Volvo D12 12-liter Class-8 truck complete turbocharger on the Holset HX52 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 engine families, different displacements, different SKU classes (complete turbo vs compressor wheel only). The cross-shop only makes sense for a fleet operator running both Volvo D12 and Cummins ISX15 Class-8 chassis in mixed inventory.
- 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 is reusing the existing Holset HE400VG / HE451VE housings, center cartridge, and wastegate actuator while installing the new billet (CNC-machined from solid metal stock rather than cast) compressor wheel. This requires turbo teardown, wheel balancing, and re-assembly — shop work that the bolt-up-and-go 40-30314AN complete-turbo replacement does not require on the Volvo D12 side. The cross-shop is structurally asymmetric.
- Are these both Class-8 heavy-duty applications?
- Yes, but for completely different engine families. The 40-30314AN serves the Volvo D12 12-liter Class-8 truck market (Volvo VNL / VNR / VHD chassis 1995-2009). The Weonefit Upgrade billet impeller serves the Cummins ISX15 15-liter Class-8 truck market (Kenworth, Peterbilt, Freightliner, International chassis 2005-onward using the HE400VG / HE451VE turbo families). Class-8 fleet operators running mixed Volvo D12 and Cummins ISX15 chassis would stock both parts; single-marque fleets only need the part matching their engine family.
- How do the warranty terms compare?
- BuyAutoParts publishes a 1-year unlimited-mileage warranty in writing on the 40-30314AN listing. Weonefit publishes a customer-service-first framing on the Upgrade billet impeller listing — encouraging buyers to contact for fitment verification before purchase — but does not publish an equivalent multi-year written warranty term. For Class-8 fleet operators where downtime cost dwarfs parts spend, the rebuilder-tier institutional alternatives (Industrial Injection, ATS Diesel Performance, KC Turbos premium) on either engine family carry longer institutional warranty depth than either of these entry-tier listings.
Use our Turbo Replacement Cost Estimator to size aftermarket spend on either Class-8 engine family against the dealer-quote baseline for your chassis. For the broader heavy-duty diesel turbocharger context, route to the cross-engine turbocharger roundup.