US Perfect Auto Parts & Supplies Inc.
Brand new MaxxForce DT466 turbocharger BorgWarner for International Navistar trucks supplied by UPAPSI

MaxxForce Turbocharger

New BorgWarner Replacement Turbochargers for International Navistar MaxxForce DT466 and MaxxForce 11/13/15

International Navistar MaxxForce engines power a huge share of North American medium-duty trucks — school buses, box trucks, delivery fleets and utility vehicles. The turbo landscape on this platform is unusually complex: the DT466 alone ran four different BorgWarner turbo systems across its production life, including the S300V single turbo, the R2S regulated two-stage twin-turbo, and the B2UV with electronic actuator. We stock brand new replacement turbochargers across the full MaxxForce range: S300V for 2003-2008 DT466E and DT570, R2S high-pressure and low-pressure units for the EPA10 DT466, three B2UV configurations with and without actuators for various DT466 builds, plus B2XG and B3RS for the MaxxForce 11, 13 and 15 heavy-duty platform. Every unit is new-built to OEM-spec dimensions, balanced, and matched by your International part number before it ships. Shops, fleets and distributors order from US stock.

  • 100% Brand New
  • OEM-Spec Quality
  • US Stock, Fast Dispatch
  • Direct-Fit Replacement
  • Exact Part-Number Match
  • 1-Year Warranty
  • No Core Charge
  • Bulk & Distributor Supply

Four DT466 Turbo Systems, One Source That Sorts Them Out

The MaxxForce DT466 turbo job is one of the most confusing orders in diesel repair. The engine looks the same across model years, but the turbo system changed multiple times — S300V, R2S twin-turbo, B2UV, each with multiple sub-variants. Order the wrong one and the truck does not leave the bay. Our MaxxForce program exists to sort that out before the part ships.

S300V, R2S, B2UV and B2XG — All DT466 Eras

Every MaxxForce turbo we ship is 100% new — new CHRA, wheels and housings. No core deposit, no old unit to crate and freight back. Competitors tie up significant cost-refundable core deposits charges; we skip that entirely.

R2S Twin-Turbo: HP and LP Sides Available

We stock turbos for every DT466 era: the S300V for 2003-2008 naturally aspirated DT466E and DT570 trucks, the B1/R2S and B2FS twin-turbo set for EPA10, and three B2UV configurations for various DT466 builds. Plus B2XG and B3RS for the MaxxForce 11/13/15 heavy-duty platform. One source for the entire International Navistar turbo catalog.

B2UV Three-Variant Selection Sorted

The EPA10 DT466 runs BorgWarner's R2S regulated two-stage system — a small B1 high-pressure turbo on the manifold paired with a larger B2FS or R2S low-pressure turbo. We stock both sides. Diagnose which stage failed, or replace the pair while the system is apart. Each product page identifies which position it covers.

Verified by BorgWarner Part Number

The B2UV is the single most common DT466 turbo configuration, and it comes in three part numbers — 12639880001, 002 and 003 — that cover different DT466 sub-variants and year ranges. Each one is available as turbo only or with a pre-installed electronic actuator. Match by the BorgWarner number on your old turbo's nameplate.

Every Unit Ships New, No Core

International part numbers change across engine codes (I313, I326, I334) and emissions tiers. We match every order against the International or BorgWarner number on the old turbo before dispatch. The wrong-variant problem never leaves our warehouse.

Built for School Bus and Delivery Fleet Shops

One-year warranty on every turbo, handled by our US team. Before install, check the oil feed line for restriction and the charge-air system for leaks — the DT466 is hard on turbo oil lines, and a coked feed line is the most common cause of repeat failure. Details on the warranty page.

S300V, R2S, B2UV and B2XG — All DT466 Eras

Every MaxxForce turbo we ship is 100% new — new CHRA, wheels and housings. No core deposit, no old unit to crate and freight back. Competitors tie up significant cost-refundable core deposits charges; we skip that entirely.

R2S Twin-Turbo: HP and LP Sides Available

We stock turbos for every DT466 era: the S300V for 2003-2008 naturally aspirated DT466E and DT570 trucks, the B1/R2S and B2FS twin-turbo set for EPA10, and three B2UV configurations for various DT466 builds. Plus B2XG and B3RS for the MaxxForce 11/13/15 heavy-duty platform. One source for the entire International Navistar turbo catalog.

B2UV Three-Variant Selection Sorted

The EPA10 DT466 runs BorgWarner's R2S regulated two-stage system — a small B1 high-pressure turbo on the manifold paired with a larger B2FS or R2S low-pressure turbo. We stock both sides. Diagnose which stage failed, or replace the pair while the system is apart. Each product page identifies which position it covers.

Verified by BorgWarner Part Number

The B2UV is the single most common DT466 turbo configuration, and it comes in three part numbers — 12639880001, 002 and 003 — that cover different DT466 sub-variants and year ranges. Each one is available as turbo only or with a pre-installed electronic actuator. Match by the BorgWarner number on your old turbo's nameplate.

Every Unit Ships New, No Core

International part numbers change across engine codes (I313, I326, I334) and emissions tiers. We match every order against the International or BorgWarner number on the old turbo before dispatch. The wrong-variant problem never leaves our warehouse.

Built for School Bus and Delivery Fleet Shops

One-year warranty on every turbo, handled by our US team. Before install, check the oil feed line for restriction and the charge-air system for leaks — the DT466 is hard on turbo oil lines, and a coked feed line is the most common cause of repeat failure. Details on the warranty page.

The right DT466 turbo, confirmed before it ships

WHY CHOOSE US

The right DT466 turbo, confirmed before it ships

MaxxForce turbo ordering is complicated — we make it simple. Send us the International part number or the BorgWarner number off the old turbo, and we confirm the match, ship from US stock, and answer install questions after the sale. Same process for one truck or a fleet restock. More about our company and quality process.

FAQ

The DT466 used multiple turbo systems across its life — S300V, R2S twin-turbo, and B2UV — and within each system there are sub-variants by engine code and year. The most reliable way to order is by the BorgWarner part number on your old turbo's nameplate (the 11-digit number starting with 126 or 127 for B2UV/R2S, or a 6-digit number for S300V). If the plate is unreadable, send us the International engine serial number and engine code (I313, I326 or I334) and we will identify the correct unit.

The R2S (Regulated Two-Stage) is BorgWarner's compound twin-turbo system used on the EPA10 MaxxForce DT466. A small B1 high-pressure turbo sits closest to the exhaust manifold and spools first for low-RPM response; a larger B2FS or R2S low-pressure turbo handles airflow volume at higher RPM. The two units are separate and must be ordered individually. Diagnose which stage failed before ordering — or replace both while the system is apart.

The 12639880001, 12639880002 and 12639880003 cover different DT466 sub-variants and model year ranges. They are not interchangeable — different compressor and turbine calibrations, different International OEM cross-reference numbers. Match by the BorgWarner number on your old turbo. Each product page lists the specific International numbers covered.

Both options are available. Each B2UV configuration is listed as turbo only and as a complete assembly with pre-installed electronic actuator. If your actuator tests good, save cost with the turbo-only version. If the actuator has failed or you want a guaranteed complete replacement, order the with-actuator listing.

All units are 100% brand new with all-new internal components — no rebuilt cores, no remanufactured housings. No core charge, nothing to ship back. Balanced, OEM-spec dimensions, one-year warranty.

Yes. School bus fleets, delivery companies and municipal truck pools running MaxxForce trucks are core customers. Consistent wholesale pricing, US inventory, and part number verification on every unit. See the wholesale page.

MaxxForce DT466 Turbocharger Guide

The International Navistar DT466 has been in production in various forms since the 1990s, and its turbo system changed significantly across emissions tiers. Knowing which generation your engine belongs to — and which turbo system it runs — is the entire ordering battle.

DT466 Turbo Systems by Era

YearsEngine codeTurbo systemType
2003-2008DT466E / DT570S300V (173900, 179035, 179033)Single, wastegated
2005-2009DT466 I326B2UV (12639880001, 002, 003)Single, electronic actuator
2007-2010DT466/570 I313B2UV 12639880003Single, electronic actuator
2010-2012DT466 I334 EPA10R2S (B1 HP + B2FS/R2S LP)Twin-turbo compound

Engine codes overlap and mid-year changes exist — always verify by the BorgWarner number on the old turbo, not by model year alone.

MaxxForce 11, 13 and 15: Heavy-Duty Platform

The MaxxForce 11/13/15 (I783 platform) was International's heavy-duty engine line from roughly 2007-2015. These engines run BorgWarner B2XG and B3RS turbochargers. The platform had a shorter production run than the DT466 and is less common in the field, but trucks running it still need turbo service.

The DT466 Twin-Turbo: R2S Explained

BorgWarner's R2S system puts two turbos in series. The small B1 sits directly on the exhaust manifold — it spools almost instantly and handles low-RPM boost. The larger B2FS or R2S unit sits downstream and takes over as exhaust flow increases. A bypass valve regulated by the ECM controls how much exhaust reaches each stage. When diagnosing a twin-turbo DT466, identify which stage failed: check each turbo's shaft play independently, listen for distinct whine from each unit, and check boost at low RPM (HP side) versus high RPM (LP side) separately.

B2UV Actuator: Diagnose Before Ordering

The B2UV uses an electronic actuator to control the wastegate. Common failure modes include a stuck or unresponsive actuator (the motor or gear train fails) and a turbo with good internals but a dead actuator. Before ordering a complete turbo-plus-actuator assembly, check whether the actuator alone has failed. An actuator-only replacement is cheaper than a full turbo swap if the turbo body is sound. We offer both options for each B2UV configuration.

Oil Feed Line: The DT466's Weak Spot

The DT466 is notorious for coking its turbo oil feed line. Carbon from degraded oil gradually restricts flow to the turbo bearings, causing starvation and premature bearing failure. When replacing any turbo on this platform, flush or replace the oil feed line as a matter of course — installing a new turbo on a restricted line will produce a repeat failure within months. Also change the oil and filter at the time of turbo replacement; the old oil carries the debris that contaminated the line in the first place.

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