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| Feature | BuyAutoParts 40-30314AN Volvo D12 Diesel Holset HX52 Replacement Turbocharger | Fleece Performance - 94-02 HX35 63mm FMW Holset Cheetah Turbocharger (FPE-HX3… |
|---|---|---|
| Year Coverage | CLASS-8 SLEEPER | 1994-2002 RAM 2500 |
| Warranty | 12-month unlimited | Manufacturer (per listing) |
| Core Charge | None required | None required |
| See the Listing | See the Listing |
Different Engine Families, Different Tiers
The structural asymmetry here is both engine family AND tier positioning. The 40-30314AN is the entry-tier complete-turbo on a Class-8 Volvo D12 chassis; the Fleece HX35 Cheetah is the rebuilder-tier institutional performance upgrade on a 1994-2002 Cummins 5.9L Ram chassis.
The 40-30314AN fitment:
40-30314AN: Class-8 Volvo D12 Anchor
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:
Fleece HX35 Cheetah: Cummins 5.9L Performance Upgrade
The Fleece Performance HX35 Cheetah is the 1994-2002 Dodge Ram 5.9L Cummins performance upgrade on the Holset HX35 frame. The 63mm FMW (Forged Milled Wheel) compressor is the upgrade-tier engineering callout.
The Cheetah HX35 rating:
The OEM-function preservation:
Rebuilder-Tier Context
Neither the 40-30314AN nor the Fleece HX35 Cheetah occupies the same tier in its respective 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 specialty), ATS Diesel Performance (Class-8 + Cummins ISX), and KC Turbos premium — all carry longer institutional warranty depth than the BuyAutoParts entry tier.
The Fleece HX35 Cheetah sits at the rebuilder-tier institutional level on the Cummins 5.9L Ram side. With 31 documented reviews at 4.4 / 5 on Thoroughbred Diesel for the 1994-2002 Cheetah variant and 74 reviews at 4.8 / 5 for the 2013-2017 Cummins VGT Cheetah variant on Crossroad Garage, Fleece Performance carries the institutional review density and production history that entry-tier alternatives (CXRacing, eBay imports) do not match on the same engine family.
If You\'re Coming From The Volvo D12 Side
If you landed on the 40-30314AN listing first, the Fleece HX35 Cheetah is not the cross-shop on your chassis. The Cheetah is a 1994-2002 Cummins 5.9L Ram performance part — different engine family, different chassis, different decade. The relevant Volvo D12 cross-shop is the rebuilder-tier Industrial Injection / ATS Diesel Performance Class-8 alternatives at the high-four-figure tier, or the broader BuyAutoParts heavy-duty diesel line including the 40-30796AN Cummins 6BT industrial HX35 (different engine, same supplier).
If You\'re Coming From The 1994-2002 Cummins 5.9L Ram Side
If you landed on the Fleece HX35 Cheetah listing first, the 40-30314AN is not the cross-shop on your chassis. The 40-30314AN is a Volvo D12 Class-8 part. The relevant 1994-2002 Cummins 5.9L Ram cross-shop runs through the BD Diesel HX35 Stock Replacement line, the Industrial Injection rebuilder-tier HX35 alternatives, and the Cummins 6BT industrial 40-30796AN cross-engine reference for shops running mixed Cummins inventory. The Cheetah is the upgrade-tier path on the 5.9L Ram; the OE-replacement path runs through BD Diesel or Industrial Injection stock-replacement units instead.
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 HX35 cross-reference manifests cited by both listings. The Rotomaster understanding turbochargers reference covers the rebuilder-tier diagnostic protocol fleet operators should run against the failed turbo before ordering either kit.
Verdict: Engine + Tier Selects The Part
No head-to-head winner. Both engine family and tier-positioning differ between these two SKUs. Pick by the engine on the failed chassis and the buyer\'s target tier.
Pick the 40-30314AN for an entry-tier Class-8 Volvo VNL / VNR / VHD with the D12 12-liter engine. Pick the Fleece HX35 Cheetah for a rebuilder-tier 1994-2002 Dodge Ram 5.9L Cummins performance upgrade with an aftermarket fueling box already on the truck. Cross-stock both only for fleet shops running both engine families and tier needs. Neither pick is interchangeable on the same chassis.
1994-2002 Cummins 5.9L Ram performance upgrade path:
Check Price on AmazonHeavy-Duty Diesel 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 Fleece Performance HX35 Cheetah is the 1994-2002 Dodge Ram 5.9L Cummins performance complete-turbo upgrade on the Holset HX35 frame. Different engine families, different displacements, different chassis platforms. The cross-shop only makes sense for a fleet operator or rebuilder shop carrying both Class-8 Volvo and 1994-2002 Cummins 5.9L Ram inventory, or a shop running mixed-platform diesel parts coverage.
- What does the Fleece Performance 63mm FMW upgrade actually deliver?
- The Fleece Performance HX35 Cheetah ships with a proprietary 63mm Forged Milled Wheel (FMW) compressor wheel that replaces the OE Holset HX35 compressor. The upgrade supports vehicle modifications up to 700 RWHP and maintains all OEM factory turbocharger functions including exhaust brake and warm-up cycles. For a 1994-2002 Dodge Ram 5.9L Cummins owner running an aftermarket fueling box and an injector upgrade above the OE fueling envelope, the Cheetah HX35 is the documented rebuilder-tier upgrade path. The BuyAutoParts 40-30314AN does not fit the 1994-2002 Ram chassis at all — different engine family, different frame size.
- How do the warranty terms compare?
- BuyAutoParts publishes a 1-year unlimited-mileage warranty in writing on the 40-30314AN listing. Fleece Performance publishes rebuilder-tier institutional warranty terms via authorized dealer channels (Thoroughbred Diesel, Crossroad Garage, Summit Racing) that vary by retailer but typically run 1-2 years on the Cheetah line. For the Volvo D12 side the BuyAutoParts entry tier is the most accessible warranty floor; for the 1994-2002 Cummins 5.9L Ram side Fleece Performance is the rebuilder-tier institutional brand with longer documented production history than the BuyAutoParts entry tier on the Cummins side.
- What does "Maintains all OEM factory turbocharger functions" mean on the Fleece side?
- The Cheetah HX35 upgrade preserves the OEM exhaust brake function on the 1994-2002 Dodge Ram chassis along with the OEM warm-up cycle protocol. Performance upgrade kits that remove the exhaust brake function lose a critical safety feature on long downhill grades; the Fleece Cheetah engineering keeps that function active even with the upgraded 63mm FMW compressor wheel. The BuyAutoParts 40-30314AN is a Volvo D12 part — the Cummins-side exhaust brake question does not apply to that chassis.
Use our Turbo Replacement Cost Estimator to size aftermarket spend on either 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.